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-rw-r--r--arch/x86/boot/.gitignore2
-rw-r--r--arch/x86/boot/Makefile29
-rw-r--r--arch/x86/boot/a20.c9
-rw-r--r--arch/x86/boot/apm.c76
-rw-r--r--arch/x86/boot/bioscall.S82
-rw-r--r--arch/x86/boot/boot.h48
-rw-r--r--arch/x86/boot/compressed/.gitignore3
-rw-r--r--arch/x86/boot/compressed/Makefile54
-rw-r--r--arch/x86/boot/compressed/head_32.S194
-rw-r--r--arch/x86/boot/compressed/head_64.S169
-rw-r--r--arch/x86/boot/compressed/misc.c12
-rw-r--r--arch/x86/boot/compressed/mkpiggy.c97
-rw-r--r--arch/x86/boot/compressed/relocs.c7
-rw-r--r--arch/x86/boot/compressed/vmlinux.lds.S (renamed from arch/x86/boot/compressed/vmlinux_64.lds)29
-rw-r--r--arch/x86/boot/compressed/vmlinux.scr10
-rw-r--r--arch/x86/boot/compressed/vmlinux_32.lds43
-rw-r--r--arch/x86/boot/edd.c71
-rw-r--r--arch/x86/boot/header.S30
-rw-r--r--arch/x86/boot/main.c39
-rw-r--r--arch/x86/boot/mca.c27
-rw-r--r--arch/x86/boot/memory.c108
-rw-r--r--arch/x86/boot/regs.c29
-rw-r--r--arch/x86/boot/setup.ld6
-rw-r--r--arch/x86/boot/tty.c52
-rw-r--r--arch/x86/boot/video-bios.c27
-rw-r--r--arch/x86/boot/video-vesa.c137
-rw-r--r--arch/x86/boot/video-vga.c95
-rw-r--r--arch/x86/boot/video.c42
-rw-r--r--arch/x86/boot/video.h14
29 files changed, 868 insertions, 673 deletions
diff --git a/arch/x86/boot/.gitignore b/arch/x86/boot/.gitignore
index 172cf8a98bdd..851fe936d242 100644
--- a/arch/x86/boot/.gitignore
+++ b/arch/x86/boot/.gitignore
@@ -3,6 +3,8 @@ bzImage
3cpustr.h 3cpustr.h
4mkcpustr 4mkcpustr
5offsets.h 5offsets.h
6voffset.h
7zoffset.h
6setup 8setup
7setup.bin 9setup.bin
8setup.elf 10setup.elf
diff --git a/arch/x86/boot/Makefile b/arch/x86/boot/Makefile
index 6633b6e7505a..8d16ada25048 100644
--- a/arch/x86/boot/Makefile
+++ b/arch/x86/boot/Makefile
@@ -26,9 +26,10 @@ targets := vmlinux.bin setup.bin setup.elf bzImage
26targets += fdimage fdimage144 fdimage288 image.iso mtools.conf 26targets += fdimage fdimage144 fdimage288 image.iso mtools.conf
27subdir- := compressed 27subdir- := compressed
28 28
29setup-y += a20.o cmdline.o copy.o cpu.o cpucheck.o edd.o 29setup-y += a20.o bioscall.o cmdline.o copy.o cpu.o cpucheck.o edd.o
30setup-y += header.o main.o mca.o memory.o pm.o pmjump.o 30setup-y += header.o main.o mca.o memory.o pm.o pmjump.o
31setup-y += printf.o string.o tty.o video.o video-mode.o version.o 31setup-y += printf.o regs.o string.o tty.o video.o video-mode.o
32setup-y += version.o
32setup-$(CONFIG_X86_APM_BOOT) += apm.o 33setup-$(CONFIG_X86_APM_BOOT) += apm.o
33 34
34# The link order of the video-*.o modules can matter. In particular, 35# The link order of the video-*.o modules can matter. In particular,
@@ -86,19 +87,27 @@ $(obj)/vmlinux.bin: $(obj)/compressed/vmlinux FORCE
86 87
87SETUP_OBJS = $(addprefix $(obj)/,$(setup-y)) 88SETUP_OBJS = $(addprefix $(obj)/,$(setup-y))
88 89
89sed-offsets := -e 's/^00*/0/' \ 90sed-voffset := -e 's/^\([0-9a-fA-F]*\) . \(_text\|_end\)$$/\#define VO_\2 0x\1/p'
90 -e 's/^\([0-9a-fA-F]*\) . \(input_data\|input_data_end\)$$/\#define \2 0x\1/p'
91 91
92quiet_cmd_offsets = OFFSETS $@ 92quiet_cmd_voffset = VOFFSET $@
93 cmd_offsets = $(NM) $< | sed -n $(sed-offsets) > $@ 93 cmd_voffset = $(NM) $< | sed -n $(sed-voffset) > $@
94 94
95$(obj)/offsets.h: $(obj)/compressed/vmlinux FORCE 95targets += voffset.h
96 $(call if_changed,offsets) 96$(obj)/voffset.h: vmlinux FORCE
97 $(call if_changed,voffset)
98
99sed-zoffset := -e 's/^\([0-9a-fA-F]*\) . \(startup_32\|input_data\|_end\|z_.*\)$$/\#define ZO_\2 0x\1/p'
100
101quiet_cmd_zoffset = ZOFFSET $@
102 cmd_zoffset = $(NM) $< | sed -n $(sed-zoffset) > $@
103
104targets += zoffset.h
105$(obj)/zoffset.h: $(obj)/compressed/vmlinux FORCE
106 $(call if_changed,zoffset)
97 107
98targets += offsets.h
99 108
100AFLAGS_header.o += -I$(obj) 109AFLAGS_header.o += -I$(obj)
101$(obj)/header.o: $(obj)/offsets.h 110$(obj)/header.o: $(obj)/voffset.h $(obj)/zoffset.h
102 111
103LDFLAGS_setup.elf := -T 112LDFLAGS_setup.elf := -T
104$(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE 113$(obj)/setup.elf: $(src)/setup.ld $(SETUP_OBJS) FORCE
diff --git a/arch/x86/boot/a20.c b/arch/x86/boot/a20.c
index 7c19ce8c2442..64a31a6d751a 100644
--- a/arch/x86/boot/a20.c
+++ b/arch/x86/boot/a20.c
@@ -2,7 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007-2008 rPath, Inc. - All Rights Reserved 4 * Copyright 2007-2008 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation 5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
6 * 6 *
7 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
8 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -90,8 +90,11 @@ static int a20_test_long(void)
90 90
91static void enable_a20_bios(void) 91static void enable_a20_bios(void)
92{ 92{
93 asm volatile("pushfl; int $0x15; popfl" 93 struct biosregs ireg;
94 : : "a" ((u16)0x2401)); 94
95 initregs(&ireg);
96 ireg.ax = 0x2401;
97 intcall(0x15, &ireg, NULL);
95} 98}
96 99
97static void enable_a20_kbc(void) 100static void enable_a20_kbc(void)
diff --git a/arch/x86/boot/apm.c b/arch/x86/boot/apm.c
index 7aa6033001f9..ee274834ea8b 100644
--- a/arch/x86/boot/apm.c
+++ b/arch/x86/boot/apm.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * Original APM BIOS checking by Stephen Rothwell, May 1994 7 * Original APM BIOS checking by Stephen Rothwell, May 1994
7 * (sfr@canb.auug.org.au) 8 * (sfr@canb.auug.org.au)
@@ -19,75 +20,56 @@
19 20
20int query_apm_bios(void) 21int query_apm_bios(void)
21{ 22{
22 u16 ax, bx, cx, dx, di; 23 struct biosregs ireg, oreg;
23 u32 ebx, esi;
24 u8 err;
25 24
26 /* APM BIOS installation check */ 25 /* APM BIOS installation check */
27 ax = 0x5300; 26 initregs(&ireg);
28 bx = cx = 0; 27 ireg.ah = 0x53;
29 asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp ; setc %0" 28 intcall(0x15, &ireg, &oreg);
30 : "=d" (err), "+a" (ax), "+b" (bx), "+c" (cx)
31 : : "esi", "edi");
32 29
33 if (err) 30 if (oreg.flags & X86_EFLAGS_CF)
34 return -1; /* No APM BIOS */ 31 return -1; /* No APM BIOS */
35 32
36 if (bx != 0x504d) /* "PM" signature */ 33 if (oreg.bx != 0x504d) /* "PM" signature */
37 return -1; 34 return -1;
38 35
39 if (!(cx & 0x02)) /* 32 bits supported? */ 36 if (!(oreg.cx & 0x02)) /* 32 bits supported? */
40 return -1; 37 return -1;
41 38
42 /* Disconnect first, just in case */ 39 /* Disconnect first, just in case */
43 ax = 0x5304; 40 ireg.al = 0x04;
44 bx = 0; 41 intcall(0x15, &ireg, NULL);
45 asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp"
46 : "+a" (ax), "+b" (bx)
47 : : "ecx", "edx", "esi", "edi");
48
49 /* Paranoia */
50 ebx = esi = 0;
51 cx = dx = di = 0;
52 42
53 /* 32-bit connect */ 43 /* 32-bit connect */
54 asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp ; setc %6" 44 ireg.al = 0x03;
55 : "=a" (ax), "+b" (ebx), "+c" (cx), "+d" (dx), 45 intcall(0x15, &ireg, &oreg);
56 "+S" (esi), "+D" (di), "=m" (err) 46
57 : "a" (0x5303)); 47 boot_params.apm_bios_info.cseg = oreg.ax;
58 48 boot_params.apm_bios_info.offset = oreg.ebx;
59 boot_params.apm_bios_info.cseg = ax; 49 boot_params.apm_bios_info.cseg_16 = oreg.cx;
60 boot_params.apm_bios_info.offset = ebx; 50 boot_params.apm_bios_info.dseg = oreg.dx;
61 boot_params.apm_bios_info.cseg_16 = cx; 51 boot_params.apm_bios_info.cseg_len = oreg.si;
62 boot_params.apm_bios_info.dseg = dx; 52 boot_params.apm_bios_info.cseg_16_len = oreg.hsi;
63 boot_params.apm_bios_info.cseg_len = (u16)esi; 53 boot_params.apm_bios_info.dseg_len = oreg.di;
64 boot_params.apm_bios_info.cseg_16_len = esi >> 16; 54
65 boot_params.apm_bios_info.dseg_len = di; 55 if (oreg.flags & X86_EFLAGS_CF)
66
67 if (err)
68 return -1; 56 return -1;
69 57
70 /* Redo the installation check as the 32-bit connect; 58 /* Redo the installation check as the 32-bit connect;
71 some BIOSes return different flags this way... */ 59 some BIOSes return different flags this way... */
72 60
73 ax = 0x5300; 61 ireg.al = 0x00;
74 bx = cx = 0; 62 intcall(0x15, &ireg, &oreg);
75 asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp ; setc %0"
76 : "=d" (err), "+a" (ax), "+b" (bx), "+c" (cx)
77 : : "esi", "edi");
78 63
79 if (err || bx != 0x504d) { 64 if ((oreg.eflags & X86_EFLAGS_CF) || oreg.bx != 0x504d) {
80 /* Failure with 32-bit connect, try to disconect and ignore */ 65 /* Failure with 32-bit connect, try to disconect and ignore */
81 ax = 0x5304; 66 ireg.al = 0x04;
82 bx = 0; 67 intcall(0x15, &ireg, NULL);
83 asm volatile("pushl %%ebp ; int $0x15 ; popl %%ebp"
84 : "+a" (ax), "+b" (bx)
85 : : "ecx", "edx", "esi", "edi");
86 return -1; 68 return -1;
87 } 69 }
88 70
89 boot_params.apm_bios_info.version = ax; 71 boot_params.apm_bios_info.version = oreg.ax;
90 boot_params.apm_bios_info.flags = cx; 72 boot_params.apm_bios_info.flags = oreg.cx;
91 return 0; 73 return 0;
92} 74}
93 75
diff --git a/arch/x86/boot/bioscall.S b/arch/x86/boot/bioscall.S
new file mode 100644
index 000000000000..507793739ea5
--- /dev/null
+++ b/arch/x86/boot/bioscall.S
@@ -0,0 +1,82 @@
1/* -----------------------------------------------------------------------
2 *
3 * Copyright 2009 Intel Corporation; author H. Peter Anvin
4 *
5 * This file is part of the Linux kernel, and is made available under
6 * the terms of the GNU General Public License version 2 or (at your
7 * option) any later version; incorporated herein by reference.
8 *
9 * ----------------------------------------------------------------------- */
10
11/*
12 * "Glove box" for BIOS calls. Avoids the constant problems with BIOSes
13 * touching registers they shouldn't be.
14 */
15
16 .code16
17 .text
18 .globl intcall
19 .type intcall, @function
20intcall:
21 /* Self-modify the INT instruction. Ugly, but works. */
22 cmpb %al, 3f
23 je 1f
24 movb %al, 3f
25 jmp 1f /* Synchronize pipeline */
261:
27 /* Save state */
28 pushfl
29 pushw %fs
30 pushw %gs
31 pushal
32
33 /* Copy input state to stack frame */
34 subw $44, %sp
35 movw %dx, %si
36 movw %sp, %di
37 movw $11, %cx
38 rep; movsd
39
40 /* Pop full state from the stack */
41 popal
42 popw %gs
43 popw %fs
44 popw %es
45 popw %ds
46 popfl
47
48 /* Actual INT */
49 .byte 0xcd /* INT opcode */
503: .byte 0
51
52 /* Push full state to the stack */
53 pushfl
54 pushw %ds
55 pushw %es
56 pushw %fs
57 pushw %gs
58 pushal
59
60 /* Re-establish C environment invariants */
61 cld
62 movzwl %sp, %esp
63 movw %cs, %ax
64 movw %ax, %ds
65 movw %ax, %es
66
67 /* Copy output state from stack frame */
68 movw 68(%esp), %di /* Original %cx == 3rd argument */
69 andw %di, %di
70 jz 4f
71 movw %sp, %si
72 movw $11, %cx
73 rep; movsd
744: addw $44, %sp
75
76 /* Restore state and return */
77 popal
78 popw %gs
79 popw %fs
80 popfl
81 retl
82 .size intcall, .-intcall
diff --git a/arch/x86/boot/boot.h b/arch/x86/boot/boot.h
index 7b2692e897e5..98239d2658f2 100644
--- a/arch/x86/boot/boot.h
+++ b/arch/x86/boot/boot.h
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -26,6 +27,7 @@
26#include <asm/setup.h> 27#include <asm/setup.h>
27#include "bitops.h" 28#include "bitops.h"
28#include <asm/cpufeature.h> 29#include <asm/cpufeature.h>
30#include <asm/processor-flags.h>
29 31
30/* Useful macros */ 32/* Useful macros */
31#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)])) 33#define BUILD_BUG_ON(condition) ((void)sizeof(char[1 - 2*!!(condition)]))
@@ -241,6 +243,49 @@ int enable_a20(void);
241/* apm.c */ 243/* apm.c */
242int query_apm_bios(void); 244int query_apm_bios(void);
243 245
246/* bioscall.c */
247struct biosregs {
248 union {
249 struct {
250 u32 edi;
251 u32 esi;
252 u32 ebp;
253 u32 _esp;
254 u32 ebx;
255 u32 edx;
256 u32 ecx;
257 u32 eax;
258 u32 _fsgs;
259 u32 _dses;
260 u32 eflags;
261 };
262 struct {
263 u16 di, hdi;
264 u16 si, hsi;
265 u16 bp, hbp;
266 u16 _sp, _hsp;
267 u16 bx, hbx;
268 u16 dx, hdx;
269 u16 cx, hcx;
270 u16 ax, hax;
271 u16 gs, fs;
272 u16 es, ds;
273 u16 flags, hflags;
274 };
275 struct {
276 u8 dil, dih, edi2, edi3;
277 u8 sil, sih, esi2, esi3;
278 u8 bpl, bph, ebp2, ebp3;
279 u8 _spl, _sph, _esp2, _esp3;
280 u8 bl, bh, ebx2, ebx3;
281 u8 dl, dh, edx2, edx3;
282 u8 cl, ch, ecx2, ecx3;
283 u8 al, ah, eax2, eax3;
284 };
285 };
286};
287void intcall(u8 int_no, const struct biosregs *ireg, struct biosregs *oreg);
288
244/* cmdline.c */ 289/* cmdline.c */
245int cmdline_find_option(const char *option, char *buffer, int bufsize); 290int cmdline_find_option(const char *option, char *buffer, int bufsize);
246int cmdline_find_option_bool(const char *option); 291int cmdline_find_option_bool(const char *option);
@@ -279,6 +324,9 @@ int sprintf(char *buf, const char *fmt, ...);
279int vsprintf(char *buf, const char *fmt, va_list args); 324int vsprintf(char *buf, const char *fmt, va_list args);
280int printf(const char *fmt, ...); 325int printf(const char *fmt, ...);
281 326
327/* regs.c */
328void initregs(struct biosregs *regs);
329
282/* string.c */ 330/* string.c */
283int strcmp(const char *str1, const char *str2); 331int strcmp(const char *str1, const char *str2);
284size_t strnlen(const char *s, size_t maxlen); 332size_t strnlen(const char *s, size_t maxlen);
diff --git a/arch/x86/boot/compressed/.gitignore b/arch/x86/boot/compressed/.gitignore
index 63eff3b04d01..4a46fab7162e 100644
--- a/arch/x86/boot/compressed/.gitignore
+++ b/arch/x86/boot/compressed/.gitignore
@@ -1,3 +1,6 @@
1relocs 1relocs
2vmlinux.bin.all 2vmlinux.bin.all
3vmlinux.relocs 3vmlinux.relocs
4vmlinux.lds
5mkpiggy
6piggy.S
diff --git a/arch/x86/boot/compressed/Makefile b/arch/x86/boot/compressed/Makefile
index 65551c9f8571..49c8a4c37d7c 100644
--- a/arch/x86/boot/compressed/Makefile
+++ b/arch/x86/boot/compressed/Makefile
@@ -19,7 +19,9 @@ KBUILD_AFLAGS := $(KBUILD_CFLAGS) -D__ASSEMBLY__
19LDFLAGS := -m elf_$(UTS_MACHINE) 19LDFLAGS := -m elf_$(UTS_MACHINE)
20LDFLAGS_vmlinux := -T 20LDFLAGS_vmlinux := -T
21 21
22$(obj)/vmlinux: $(src)/vmlinux_$(BITS).lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE 22hostprogs-y := mkpiggy
23
24$(obj)/vmlinux: $(obj)/vmlinux.lds $(obj)/head_$(BITS).o $(obj)/misc.o $(obj)/piggy.o FORCE
23 $(call if_changed,ld) 25 $(call if_changed,ld)
24 @: 26 @:
25 27
@@ -29,7 +31,7 @@ $(obj)/vmlinux.bin: vmlinux FORCE
29 31
30 32
31targets += vmlinux.bin.all vmlinux.relocs relocs 33targets += vmlinux.bin.all vmlinux.relocs relocs
32hostprogs-$(CONFIG_X86_32) += relocs 34hostprogs-$(CONFIG_X86_NEED_RELOCS) += relocs
33 35
34quiet_cmd_relocs = RELOCS $@ 36quiet_cmd_relocs = RELOCS $@
35 cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $< 37 cmd_relocs = $(obj)/relocs $< > $@;$(obj)/relocs --abs-relocs $<
@@ -37,46 +39,22 @@ $(obj)/vmlinux.relocs: vmlinux $(obj)/relocs FORCE
37 $(call if_changed,relocs) 39 $(call if_changed,relocs)
38 40
39vmlinux.bin.all-y := $(obj)/vmlinux.bin 41vmlinux.bin.all-y := $(obj)/vmlinux.bin
40vmlinux.bin.all-$(CONFIG_RELOCATABLE) += $(obj)/vmlinux.relocs 42vmlinux.bin.all-$(CONFIG_X86_NEED_RELOCS) += $(obj)/vmlinux.relocs
41quiet_cmd_relocbin = BUILD $@
42 cmd_relocbin = cat $(filter-out FORCE,$^) > $@
43$(obj)/vmlinux.bin.all: $(vmlinux.bin.all-y) FORCE
44 $(call if_changed,relocbin)
45
46ifeq ($(CONFIG_X86_32),y)
47 43
48ifdef CONFIG_RELOCATABLE 44$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y) FORCE
49$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin.all FORCE
50 $(call if_changed,gzip)
51$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin.all FORCE
52 $(call if_changed,bzip2)
53$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin.all FORCE
54 $(call if_changed,lzma)
55else
56$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
57 $(call if_changed,gzip) 45 $(call if_changed,gzip)
58$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE 46$(obj)/vmlinux.bin.bz2: $(vmlinux.bin.all-y) FORCE
59 $(call if_changed,bzip2) 47 $(call if_changed,bzip2)
60$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE 48$(obj)/vmlinux.bin.lzma: $(vmlinux.bin.all-y) FORCE
61 $(call if_changed,lzma) 49 $(call if_changed,lzma)
62endif
63LDFLAGS_piggy.o := -r --format binary --oformat elf32-i386 -T
64 50
65else 51suffix-$(CONFIG_KERNEL_GZIP) := gz
52suffix-$(CONFIG_KERNEL_BZIP2) := bz2
53suffix-$(CONFIG_KERNEL_LZMA) := lzma
66 54
67$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE 55quiet_cmd_mkpiggy = MKPIGGY $@
68 $(call if_changed,gzip) 56 cmd_mkpiggy = $(obj)/mkpiggy $< > $@ || ( rm -f $@ ; false )
69$(obj)/vmlinux.bin.bz2: $(obj)/vmlinux.bin FORCE
70 $(call if_changed,bzip2)
71$(obj)/vmlinux.bin.lzma: $(obj)/vmlinux.bin FORCE
72 $(call if_changed,lzma)
73
74LDFLAGS_piggy.o := -r --format binary --oformat elf64-x86-64 -T
75endif
76 57
77suffix_$(CONFIG_KERNEL_GZIP) = gz 58targets += piggy.S
78suffix_$(CONFIG_KERNEL_BZIP2) = bz2 59$(obj)/piggy.S: $(obj)/vmlinux.bin.$(suffix-y) $(obj)/mkpiggy FORCE
79suffix_$(CONFIG_KERNEL_LZMA) = lzma 60 $(call if_changed,mkpiggy)
80
81$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix_y) FORCE
82 $(call if_changed,ld)
diff --git a/arch/x86/boot/compressed/head_32.S b/arch/x86/boot/compressed/head_32.S
index 3a8a866fb2e2..75e4f001e706 100644
--- a/arch/x86/boot/compressed/head_32.S
+++ b/arch/x86/boot/compressed/head_32.S
@@ -12,16 +12,16 @@
12 * the page directory. [According to comments etc elsewhere on a compressed 12 * the page directory. [According to comments etc elsewhere on a compressed
13 * kernel it will end up at 0x1000 + 1Mb I hope so as I assume this. - AC] 13 * kernel it will end up at 0x1000 + 1Mb I hope so as I assume this. - AC]
14 * 14 *
15 * Page 0 is deliberately kept safe, since System Management Mode code in 15 * Page 0 is deliberately kept safe, since System Management Mode code in
16 * laptops may need to access the BIOS data stored there. This is also 16 * laptops may need to access the BIOS data stored there. This is also
17 * useful for future device drivers that either access the BIOS via VM86 17 * useful for future device drivers that either access the BIOS via VM86
18 * mode. 18 * mode.
19 */ 19 */
20 20
21/* 21/*
22 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996 22 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
23 */ 23 */
24.text 24 .text
25 25
26#include <linux/linkage.h> 26#include <linux/linkage.h>
27#include <asm/segment.h> 27#include <asm/segment.h>
@@ -29,161 +29,151 @@
29#include <asm/boot.h> 29#include <asm/boot.h>
30#include <asm/asm-offsets.h> 30#include <asm/asm-offsets.h>
31 31
32.section ".text.head","ax",@progbits 32 .section ".text.head","ax",@progbits
33ENTRY(startup_32) 33ENTRY(startup_32)
34 cld 34 cld
35 /* test KEEP_SEGMENTS flag to see if the bootloader is asking 35 /*
36 * us to not reload segments */ 36 * Test KEEP_SEGMENTS flag to see if the bootloader is asking
37 testb $(1<<6), BP_loadflags(%esi) 37 * us to not reload segments
38 jnz 1f 38 */
39 testb $(1<<6), BP_loadflags(%esi)
40 jnz 1f
39 41
40 cli 42 cli
41 movl $(__BOOT_DS),%eax 43 movl $__BOOT_DS, %eax
42 movl %eax,%ds 44 movl %eax, %ds
43 movl %eax,%es 45 movl %eax, %es
44 movl %eax,%fs 46 movl %eax, %fs
45 movl %eax,%gs 47 movl %eax, %gs
46 movl %eax,%ss 48 movl %eax, %ss
471: 491:
48 50
49/* Calculate the delta between where we were compiled to run 51/*
52 * Calculate the delta between where we were compiled to run
50 * at and where we were actually loaded at. This can only be done 53 * at and where we were actually loaded at. This can only be done
51 * with a short local call on x86. Nothing else will tell us what 54 * with a short local call on x86. Nothing else will tell us what
52 * address we are running at. The reserved chunk of the real-mode 55 * address we are running at. The reserved chunk of the real-mode
53 * data at 0x1e4 (defined as a scratch field) are used as the stack 56 * data at 0x1e4 (defined as a scratch field) are used as the stack
54 * for this calculation. Only 4 bytes are needed. 57 * for this calculation. Only 4 bytes are needed.
55 */ 58 */
56 leal (0x1e4+4)(%esi), %esp 59 leal (BP_scratch+4)(%esi), %esp
57 call 1f 60 call 1f
581: popl %ebp 611: popl %ebp
59 subl $1b, %ebp 62 subl $1b, %ebp
60 63
61/* %ebp contains the address we are loaded at by the boot loader and %ebx 64/*
65 * %ebp contains the address we are loaded at by the boot loader and %ebx
62 * contains the address where we should move the kernel image temporarily 66 * contains the address where we should move the kernel image temporarily
63 * for safe in-place decompression. 67 * for safe in-place decompression.
64 */ 68 */
65 69
66#ifdef CONFIG_RELOCATABLE 70#ifdef CONFIG_RELOCATABLE
67 movl %ebp, %ebx 71 movl %ebp, %ebx
68 addl $(CONFIG_PHYSICAL_ALIGN - 1), %ebx 72 movl BP_kernel_alignment(%esi), %eax
69 andl $(~(CONFIG_PHYSICAL_ALIGN - 1)), %ebx 73 decl %eax
74 addl %eax, %ebx
75 notl %eax
76 andl %eax, %ebx
70#else 77#else
71 movl $LOAD_PHYSICAL_ADDR, %ebx 78 movl $LOAD_PHYSICAL_ADDR, %ebx
72#endif 79#endif
73 80
74 /* Replace the compressed data size with the uncompressed size */ 81 /* Target address to relocate to for decompression */
75 subl input_len(%ebp), %ebx 82 addl $z_extract_offset, %ebx
76 movl output_len(%ebp), %eax 83
77 addl %eax, %ebx 84 /* Set up the stack */
78 /* Add 8 bytes for every 32K input block */ 85 leal boot_stack_end(%ebx), %esp
79 shrl $12, %eax 86
80 addl %eax, %ebx 87 /* Zero EFLAGS */
81 /* Add 32K + 18 bytes of extra slack */ 88 pushl $0
82 addl $(32768 + 18), %ebx 89 popfl
83 /* Align on a 4K boundary */ 90
84 addl $4095, %ebx 91/*
85 andl $~4095, %ebx 92 * Copy the compressed kernel to the end of our buffer
86
87/* Copy the compressed kernel to the end of our buffer
88 * where decompression in place becomes safe. 93 * where decompression in place becomes safe.
89 */ 94 */
90 pushl %esi 95 pushl %esi
91 leal _end(%ebp), %esi 96 leal (_bss-4)(%ebp), %esi
92 leal _end(%ebx), %edi 97 leal (_bss-4)(%ebx), %edi
93 movl $(_end - startup_32), %ecx 98 movl $(_bss - startup_32), %ecx
99 shrl $2, %ecx
94 std 100 std
95 rep 101 rep movsl
96 movsb
97 cld 102 cld
98 popl %esi 103 popl %esi
99
100/* Compute the kernel start address.
101 */
102#ifdef CONFIG_RELOCATABLE
103 addl $(CONFIG_PHYSICAL_ALIGN - 1), %ebp
104 andl $(~(CONFIG_PHYSICAL_ALIGN - 1)), %ebp
105#else
106 movl $LOAD_PHYSICAL_ADDR, %ebp
107#endif
108 104
109/* 105/*
110 * Jump to the relocated address. 106 * Jump to the relocated address.
111 */ 107 */
112 leal relocated(%ebx), %eax 108 leal relocated(%ebx), %eax
113 jmp *%eax 109 jmp *%eax
114ENDPROC(startup_32) 110ENDPROC(startup_32)
115 111
116.section ".text" 112 .text
117relocated: 113relocated:
118 114
119/* 115/*
120 * Clear BSS 116 * Clear BSS (stack is currently empty)
121 */
122 xorl %eax,%eax
123 leal _edata(%ebx),%edi
124 leal _end(%ebx), %ecx
125 subl %edi,%ecx
126 cld
127 rep
128 stosb
129
130/*
131 * Setup the stack for the decompressor
132 */ 117 */
133 leal boot_stack_end(%ebx), %esp 118 xorl %eax, %eax
119 leal _bss(%ebx), %edi
120 leal _ebss(%ebx), %ecx
121 subl %edi, %ecx
122 shrl $2, %ecx
123 rep stosl
134 124
135/* 125/*
136 * Do the decompression, and jump to the new kernel.. 126 * Do the decompression, and jump to the new kernel..
137 */ 127 */
138 movl output_len(%ebx), %eax 128 leal z_extract_offset_negative(%ebx), %ebp
139 pushl %eax 129 /* push arguments for decompress_kernel: */
140 # push arguments for decompress_kernel: 130 pushl %ebp /* output address */
141 pushl %ebp # output address 131 pushl $z_input_len /* input_len */
142 movl input_len(%ebx), %eax 132 leal input_data(%ebx), %eax
143 pushl %eax # input_len 133 pushl %eax /* input_data */
144 leal input_data(%ebx), %eax 134 leal boot_heap(%ebx), %eax
145 pushl %eax # input_data 135 pushl %eax /* heap area */
146 leal boot_heap(%ebx), %eax 136 pushl %esi /* real mode pointer */
147 pushl %eax # heap area 137 call decompress_kernel
148 pushl %esi # real mode pointer 138 addl $20, %esp
149 call decompress_kernel
150 addl $20, %esp
151 popl %ecx
152 139
153#if CONFIG_RELOCATABLE 140#if CONFIG_RELOCATABLE
154/* Find the address of the relocations. 141/*
142 * Find the address of the relocations.
155 */ 143 */
156 movl %ebp, %edi 144 leal z_output_len(%ebp), %edi
157 addl %ecx, %edi
158 145
159/* Calculate the delta between where vmlinux was compiled to run 146/*
147 * Calculate the delta between where vmlinux was compiled to run
160 * and where it was actually loaded. 148 * and where it was actually loaded.
161 */ 149 */
162 movl %ebp, %ebx 150 movl %ebp, %ebx
163 subl $LOAD_PHYSICAL_ADDR, %ebx 151 subl $LOAD_PHYSICAL_ADDR, %ebx
164 jz 2f /* Nothing to be done if loaded at compiled addr. */ 152 jz 2f /* Nothing to be done if loaded at compiled addr. */
165/* 153/*
166 * Process relocations. 154 * Process relocations.
167 */ 155 */
168 156
1691: subl $4, %edi 1571: subl $4, %edi
170 movl 0(%edi), %ecx 158 movl (%edi), %ecx
171 testl %ecx, %ecx 159 testl %ecx, %ecx
172 jz 2f 160 jz 2f
173 addl %ebx, -__PAGE_OFFSET(%ebx, %ecx) 161 addl %ebx, -__PAGE_OFFSET(%ebx, %ecx)
174 jmp 1b 162 jmp 1b
1752: 1632:
176#endif 164#endif
177 165
178/* 166/*
179 * Jump to the decompressed kernel. 167 * Jump to the decompressed kernel.
180 */ 168 */
181 xorl %ebx,%ebx 169 xorl %ebx, %ebx
182 jmp *%ebp 170 jmp *%ebp
183 171
184.bss 172/*
185/* Stack and heap for uncompression */ 173 * Stack and heap for uncompression
186.balign 4 174 */
175 .bss
176 .balign 4
187boot_heap: 177boot_heap:
188 .fill BOOT_HEAP_SIZE, 1, 0 178 .fill BOOT_HEAP_SIZE, 1, 0
189boot_stack: 179boot_stack:
diff --git a/arch/x86/boot/compressed/head_64.S b/arch/x86/boot/compressed/head_64.S
index ed4a82948002..f62c284db9eb 100644
--- a/arch/x86/boot/compressed/head_64.S
+++ b/arch/x86/boot/compressed/head_64.S
@@ -21,8 +21,8 @@
21/* 21/*
22 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996 22 * High loaded stuff by Hans Lermen & Werner Almesberger, Feb. 1996
23 */ 23 */
24.code32 24 .code32
25.text 25 .text
26 26
27#include <linux/linkage.h> 27#include <linux/linkage.h>
28#include <asm/segment.h> 28#include <asm/segment.h>
@@ -33,12 +33,14 @@
33#include <asm/processor-flags.h> 33#include <asm/processor-flags.h>
34#include <asm/asm-offsets.h> 34#include <asm/asm-offsets.h>
35 35
36.section ".text.head" 36 .section ".text.head"
37 .code32 37 .code32
38ENTRY(startup_32) 38ENTRY(startup_32)
39 cld 39 cld
40 /* test KEEP_SEGMENTS flag to see if the bootloader is asking 40 /*
41 * us to not reload segments */ 41 * Test KEEP_SEGMENTS flag to see if the bootloader is asking
42 * us to not reload segments
43 */
42 testb $(1<<6), BP_loadflags(%esi) 44 testb $(1<<6), BP_loadflags(%esi)
43 jnz 1f 45 jnz 1f
44 46
@@ -49,14 +51,15 @@ ENTRY(startup_32)
49 movl %eax, %ss 51 movl %eax, %ss
501: 521:
51 53
52/* Calculate the delta between where we were compiled to run 54/*
55 * Calculate the delta between where we were compiled to run
53 * at and where we were actually loaded at. This can only be done 56 * at and where we were actually loaded at. This can only be done
54 * with a short local call on x86. Nothing else will tell us what 57 * with a short local call on x86. Nothing else will tell us what
55 * address we are running at. The reserved chunk of the real-mode 58 * address we are running at. The reserved chunk of the real-mode
56 * data at 0x1e4 (defined as a scratch field) are used as the stack 59 * data at 0x1e4 (defined as a scratch field) are used as the stack
57 * for this calculation. Only 4 bytes are needed. 60 * for this calculation. Only 4 bytes are needed.
58 */ 61 */
59 leal (0x1e4+4)(%esi), %esp 62 leal (BP_scratch+4)(%esi), %esp
60 call 1f 63 call 1f
611: popl %ebp 641: popl %ebp
62 subl $1b, %ebp 65 subl $1b, %ebp
@@ -70,32 +73,28 @@ ENTRY(startup_32)
70 testl %eax, %eax 73 testl %eax, %eax
71 jnz no_longmode 74 jnz no_longmode
72 75
73/* Compute the delta between where we were compiled to run at 76/*
77 * Compute the delta between where we were compiled to run at
74 * and where the code will actually run at. 78 * and where the code will actually run at.
75 */ 79 *
76/* %ebp contains the address we are loaded at by the boot loader and %ebx 80 * %ebp contains the address we are loaded at by the boot loader and %ebx
77 * contains the address where we should move the kernel image temporarily 81 * contains the address where we should move the kernel image temporarily
78 * for safe in-place decompression. 82 * for safe in-place decompression.
79 */ 83 */
80 84
81#ifdef CONFIG_RELOCATABLE 85#ifdef CONFIG_RELOCATABLE
82 movl %ebp, %ebx 86 movl %ebp, %ebx
83 addl $(PMD_PAGE_SIZE -1), %ebx 87 movl BP_kernel_alignment(%esi), %eax
84 andl $PMD_PAGE_MASK, %ebx 88 decl %eax
89 addl %eax, %ebx
90 notl %eax
91 andl %eax, %ebx
85#else 92#else
86 movl $CONFIG_PHYSICAL_START, %ebx 93 movl $LOAD_PHYSICAL_ADDR, %ebx
87#endif 94#endif
88 95
89 /* Replace the compressed data size with the uncompressed size */ 96 /* Target address to relocate to for decompression */
90 subl input_len(%ebp), %ebx 97 addl $z_extract_offset, %ebx
91 movl output_len(%ebp), %eax
92 addl %eax, %ebx
93 /* Add 8 bytes for every 32K input block */
94 shrl $12, %eax
95 addl %eax, %ebx
96 /* Add 32K + 18 bytes of extra slack and align on a 4K boundary */
97 addl $(32768 + 18 + 4095), %ebx
98 andl $~4095, %ebx
99 98
100/* 99/*
101 * Prepare for entering 64 bit mode 100 * Prepare for entering 64 bit mode
@@ -114,7 +113,7 @@ ENTRY(startup_32)
114 /* 113 /*
115 * Build early 4G boot pagetable 114 * Build early 4G boot pagetable
116 */ 115 */
117 /* Initialize Page tables to 0*/ 116 /* Initialize Page tables to 0 */
118 leal pgtable(%ebx), %edi 117 leal pgtable(%ebx), %edi
119 xorl %eax, %eax 118 xorl %eax, %eax
120 movl $((4096*6)/4), %ecx 119 movl $((4096*6)/4), %ecx
@@ -155,7 +154,8 @@ ENTRY(startup_32)
155 btsl $_EFER_LME, %eax 154 btsl $_EFER_LME, %eax
156 wrmsr 155 wrmsr
157 156
158 /* Setup for the jump to 64bit mode 157 /*
158 * Setup for the jump to 64bit mode
159 * 159 *
160 * When the jump is performend we will be in long mode but 160 * When the jump is performend we will be in long mode but
161 * in 32bit compatibility mode with EFER.LME = 1, CS.L = 0, CS.D = 1 161 * in 32bit compatibility mode with EFER.LME = 1, CS.L = 0, CS.D = 1
@@ -184,7 +184,8 @@ no_longmode:
184 184
185#include "../../kernel/verify_cpu_64.S" 185#include "../../kernel/verify_cpu_64.S"
186 186
187 /* Be careful here startup_64 needs to be at a predictable 187 /*
188 * Be careful here startup_64 needs to be at a predictable
188 * address so I can export it in an ELF header. Bootloaders 189 * address so I can export it in an ELF header. Bootloaders
189 * should look at the ELF header to find this address, as 190 * should look at the ELF header to find this address, as
190 * it may change in the future. 191 * it may change in the future.
@@ -192,7 +193,8 @@ no_longmode:
192 .code64 193 .code64
193 .org 0x200 194 .org 0x200
194ENTRY(startup_64) 195ENTRY(startup_64)
195 /* We come here either from startup_32 or directly from a 196 /*
197 * We come here either from startup_32 or directly from a
196 * 64bit bootloader. If we come here from a bootloader we depend on 198 * 64bit bootloader. If we come here from a bootloader we depend on
197 * an identity mapped page table being provied that maps our 199 * an identity mapped page table being provied that maps our
198 * entire text+data+bss and hopefully all of memory. 200 * entire text+data+bss and hopefully all of memory.
@@ -209,50 +211,54 @@ ENTRY(startup_64)
209 movl $0x20, %eax 211 movl $0x20, %eax
210 ltr %ax 212 ltr %ax
211 213
212 /* Compute the decompressed kernel start address. It is where 214 /*
215 * Compute the decompressed kernel start address. It is where
213 * we were loaded at aligned to a 2M boundary. %rbp contains the 216 * we were loaded at aligned to a 2M boundary. %rbp contains the
214 * decompressed kernel start address. 217 * decompressed kernel start address.
215 * 218 *
216 * If it is a relocatable kernel then decompress and run the kernel 219 * If it is a relocatable kernel then decompress and run the kernel
217 * from load address aligned to 2MB addr, otherwise decompress and 220 * from load address aligned to 2MB addr, otherwise decompress and
218 * run the kernel from CONFIG_PHYSICAL_START 221 * run the kernel from LOAD_PHYSICAL_ADDR
222 *
223 * We cannot rely on the calculation done in 32-bit mode, since we
224 * may have been invoked via the 64-bit entry point.
219 */ 225 */
220 226
221 /* Start with the delta to where the kernel will run at. */ 227 /* Start with the delta to where the kernel will run at. */
222#ifdef CONFIG_RELOCATABLE 228#ifdef CONFIG_RELOCATABLE
223 leaq startup_32(%rip) /* - $startup_32 */, %rbp 229 leaq startup_32(%rip) /* - $startup_32 */, %rbp
224 addq $(PMD_PAGE_SIZE - 1), %rbp 230 movl BP_kernel_alignment(%rsi), %eax
225 andq $PMD_PAGE_MASK, %rbp 231 decl %eax
226 movq %rbp, %rbx 232 addq %rax, %rbp
233 notq %rax
234 andq %rax, %rbp
227#else 235#else
228 movq $CONFIG_PHYSICAL_START, %rbp 236 movq $LOAD_PHYSICAL_ADDR, %rbp
229 movq %rbp, %rbx
230#endif 237#endif
231 238
232 /* Replace the compressed data size with the uncompressed size */ 239 /* Target address to relocate to for decompression */
233 movl input_len(%rip), %eax 240 leaq z_extract_offset(%rbp), %rbx
234 subq %rax, %rbx 241
235 movl output_len(%rip), %eax 242 /* Set up the stack */
236 addq %rax, %rbx 243 leaq boot_stack_end(%rbx), %rsp
237 /* Add 8 bytes for every 32K input block */ 244
238 shrq $12, %rax 245 /* Zero EFLAGS */
239 addq %rax, %rbx 246 pushq $0
240 /* Add 32K + 18 bytes of extra slack and align on a 4K boundary */ 247 popfq
241 addq $(32768 + 18 + 4095), %rbx 248
242 andq $~4095, %rbx 249/*
243 250 * Copy the compressed kernel to the end of our buffer
244/* Copy the compressed kernel to the end of our buffer
245 * where decompression in place becomes safe. 251 * where decompression in place becomes safe.
246 */ 252 */
247 leaq _end_before_pgt(%rip), %r8 253 pushq %rsi
248 leaq _end_before_pgt(%rbx), %r9 254 leaq (_bss-8)(%rip), %rsi
249 movq $_end_before_pgt /* - $startup_32 */, %rcx 255 leaq (_bss-8)(%rbx), %rdi
2501: subq $8, %r8 256 movq $_bss /* - $startup_32 */, %rcx
251 subq $8, %r9 257 shrq $3, %rcx
252 movq 0(%r8), %rax 258 std
253 movq %rax, 0(%r9) 259 rep movsq
254 subq $8, %rcx 260 cld
255 jnz 1b 261 popq %rsi
256 262
257/* 263/*
258 * Jump to the relocated address. 264 * Jump to the relocated address.
@@ -260,37 +266,28 @@ ENTRY(startup_64)
260 leaq relocated(%rbx), %rax 266 leaq relocated(%rbx), %rax
261 jmp *%rax 267 jmp *%rax
262 268
263.section ".text" 269 .text
264relocated: 270relocated:
265 271
266/* 272/*
267 * Clear BSS 273 * Clear BSS (stack is currently empty)
268 */ 274 */
269 xorq %rax, %rax 275 xorl %eax, %eax
270 leaq _edata(%rbx), %rdi 276 leaq _bss(%rip), %rdi
271 leaq _end_before_pgt(%rbx), %rcx 277 leaq _ebss(%rip), %rcx
272 subq %rdi, %rcx 278 subq %rdi, %rcx
273 cld 279 shrq $3, %rcx
274 rep 280 rep stosq
275 stosb
276
277 /* Setup the stack */
278 leaq boot_stack_end(%rip), %rsp
279
280 /* zero EFLAGS after setting rsp */
281 pushq $0
282 popfq
283 281
284/* 282/*
285 * Do the decompression, and jump to the new kernel.. 283 * Do the decompression, and jump to the new kernel..
286 */ 284 */
287 pushq %rsi # Save the real mode argument 285 pushq %rsi /* Save the real mode argument */
288 movq %rsi, %rdi # real mode address 286 movq %rsi, %rdi /* real mode address */
289 leaq boot_heap(%rip), %rsi # malloc area for uncompression 287 leaq boot_heap(%rip), %rsi /* malloc area for uncompression */
290 leaq input_data(%rip), %rdx # input_data 288 leaq input_data(%rip), %rdx /* input_data */
291 movl input_len(%rip), %eax 289 movl $z_input_len, %ecx /* input_len */
292 movq %rax, %rcx # input_len 290 movq %rbp, %r8 /* output target address */
293 movq %rbp, %r8 # output
294 call decompress_kernel 291 call decompress_kernel
295 popq %rsi 292 popq %rsi
296 293
@@ -311,11 +308,21 @@ gdt:
311 .quad 0x0000000000000000 /* TS continued */ 308 .quad 0x0000000000000000 /* TS continued */
312gdt_end: 309gdt_end:
313 310
314.bss 311/*
315/* Stack and heap for uncompression */ 312 * Stack and heap for uncompression
316.balign 4 313 */
314 .bss
315 .balign 4
317boot_heap: 316boot_heap:
318 .fill BOOT_HEAP_SIZE, 1, 0 317 .fill BOOT_HEAP_SIZE, 1, 0
319boot_stack: 318boot_stack:
320 .fill BOOT_STACK_SIZE, 1, 0 319 .fill BOOT_STACK_SIZE, 1, 0
321boot_stack_end: 320boot_stack_end:
321
322/*
323 * Space for page tables (not in .bss so not zeroed)
324 */
325 .section ".pgtable","a",@nobits
326 .balign 4096
327pgtable:
328 .fill 6*4096, 1, 0
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index e45be73684ff..842b2a36174a 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -325,21 +325,19 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
325 free_mem_ptr = heap; /* Heap */ 325 free_mem_ptr = heap; /* Heap */
326 free_mem_end_ptr = heap + BOOT_HEAP_SIZE; 326 free_mem_end_ptr = heap + BOOT_HEAP_SIZE;
327 327
328 if ((unsigned long)output & (MIN_KERNEL_ALIGN - 1))
329 error("Destination address inappropriately aligned");
328#ifdef CONFIG_X86_64 330#ifdef CONFIG_X86_64
329 if ((unsigned long)output & (__KERNEL_ALIGN - 1)) 331 if (heap > 0x3fffffffffffUL)
330 error("Destination address not 2M aligned");
331 if ((unsigned long)output >= 0xffffffffffUL)
332 error("Destination address too large"); 332 error("Destination address too large");
333#else 333#else
334 if ((u32)output & (CONFIG_PHYSICAL_ALIGN - 1))
335 error("Destination address not CONFIG_PHYSICAL_ALIGN aligned");
336 if (heap > ((-__PAGE_OFFSET-(512<<20)-1) & 0x7fffffff)) 334 if (heap > ((-__PAGE_OFFSET-(512<<20)-1) & 0x7fffffff))
337 error("Destination address too large"); 335 error("Destination address too large");
336#endif
338#ifndef CONFIG_RELOCATABLE 337#ifndef CONFIG_RELOCATABLE
339 if ((u32)output != LOAD_PHYSICAL_ADDR) 338 if ((unsigned long)output != LOAD_PHYSICAL_ADDR)
340 error("Wrong destination address"); 339 error("Wrong destination address");
341#endif 340#endif
342#endif
343 341
344 if (!quiet) 342 if (!quiet)
345 putstr("\nDecompressing Linux... "); 343 putstr("\nDecompressing Linux... ");
diff --git a/arch/x86/boot/compressed/mkpiggy.c b/arch/x86/boot/compressed/mkpiggy.c
new file mode 100644
index 000000000000..bcbd36c41432
--- /dev/null
+++ b/arch/x86/boot/compressed/mkpiggy.c
@@ -0,0 +1,97 @@
1/* ----------------------------------------------------------------------- *
2 *
3 * Copyright (C) 2009 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License version
7 * 2 as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
17 * 02110-1301, USA.
18 *
19 * H. Peter Anvin <hpa@linux.intel.com>
20 *
21 * ----------------------------------------------------------------------- */
22
23/*
24 * Compute the desired load offset from a compressed program; outputs
25 * a small assembly wrapper with the appropriate symbols defined.
26 */
27
28#include <stdlib.h>
29#include <stdio.h>
30#include <string.h>
31#include <inttypes.h>
32
33static uint32_t getle32(const void *p)
34{
35 const uint8_t *cp = p;
36
37 return (uint32_t)cp[0] + ((uint32_t)cp[1] << 8) +
38 ((uint32_t)cp[2] << 16) + ((uint32_t)cp[3] << 24);
39}
40
41int main(int argc, char *argv[])
42{
43 uint32_t olen;
44 long ilen;
45 unsigned long offs;
46 FILE *f;
47
48 if (argc < 2) {
49 fprintf(stderr, "Usage: %s compressed_file\n", argv[0]);
50 return 1;
51 }
52
53 /* Get the information for the compressed kernel image first */
54
55 f = fopen(argv[1], "r");
56 if (!f) {
57 perror(argv[1]);
58 return 1;
59 }
60
61
62 if (fseek(f, -4L, SEEK_END)) {
63 perror(argv[1]);
64 }
65 fread(&olen, sizeof olen, 1, f);
66 ilen = ftell(f);
67 olen = getle32(&olen);
68 fclose(f);
69
70 /*
71 * Now we have the input (compressed) and output (uncompressed)
72 * sizes, compute the necessary decompression offset...
73 */
74
75 offs = (olen > ilen) ? olen - ilen : 0;
76 offs += olen >> 12; /* Add 8 bytes for each 32K block */
77 offs += 32*1024 + 18; /* Add 32K + 18 bytes slack */
78 offs = (offs+4095) & ~4095; /* Round to a 4K boundary */
79
80 printf(".section \".rodata.compressed\",\"a\",@progbits\n");
81 printf(".globl z_input_len\n");
82 printf("z_input_len = %lu\n", ilen);
83 printf(".globl z_output_len\n");
84 printf("z_output_len = %lu\n", (unsigned long)olen);
85 printf(".globl z_extract_offset\n");
86 printf("z_extract_offset = 0x%lx\n", offs);
87 /* z_extract_offset_negative allows simplification of head_32.S */
88 printf(".globl z_extract_offset_negative\n");
89 printf("z_extract_offset_negative = -0x%lx\n", offs);
90
91 printf(".globl input_data, input_data_end\n");
92 printf("input_data:\n");
93 printf(".incbin \"%s\"\n", argv[1]);
94 printf("input_data_end:\n");
95
96 return 0;
97}
diff --git a/arch/x86/boot/compressed/relocs.c b/arch/x86/boot/compressed/relocs.c
index 857e492c571e..bbeb0c3fbd90 100644
--- a/arch/x86/boot/compressed/relocs.c
+++ b/arch/x86/boot/compressed/relocs.c
@@ -504,8 +504,11 @@ static void walk_relocs(void (*visit)(Elf32_Rel *rel, Elf32_Sym *sym))
504 if (sym->st_shndx == SHN_ABS) { 504 if (sym->st_shndx == SHN_ABS) {
505 continue; 505 continue;
506 } 506 }
507 if (r_type == R_386_PC32) { 507 if (r_type == R_386_NONE || r_type == R_386_PC32) {
508 /* PC relative relocations don't need to be adjusted */ 508 /*
509 * NONE can be ignored and and PC relative
510 * relocations don't need to be adjusted.
511 */
509 } 512 }
510 else if (r_type == R_386_32) { 513 else if (r_type == R_386_32) {
511 /* Visit relocations that need to be adjusted */ 514 /* Visit relocations that need to be adjusted */
diff --git a/arch/x86/boot/compressed/vmlinux_64.lds b/arch/x86/boot/compressed/vmlinux.lds.S
index bef1ac891bce..cc353e1b3ffd 100644
--- a/arch/x86/boot/compressed/vmlinux_64.lds
+++ b/arch/x86/boot/compressed/vmlinux.lds.S
@@ -1,6 +1,17 @@
1OUTPUT_FORMAT("elf64-x86-64", "elf64-x86-64", "elf64-x86-64") 1OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
2
3#undef i386
4
5#include <asm/page_types.h>
6
7#ifdef CONFIG_X86_64
2OUTPUT_ARCH(i386:x86-64) 8OUTPUT_ARCH(i386:x86-64)
3ENTRY(startup_64) 9ENTRY(startup_64)
10#else
11OUTPUT_ARCH(i386)
12ENTRY(startup_32)
13#endif
14
4SECTIONS 15SECTIONS
5{ 16{
6 /* Be careful parts of head_64.S assume startup_32 is at 17 /* Be careful parts of head_64.S assume startup_32 is at
@@ -33,16 +44,22 @@ SECTIONS
33 *(.data.*) 44 *(.data.*)
34 _edata = . ; 45 _edata = . ;
35 } 46 }
47 . = ALIGN(CONFIG_X86_L1_CACHE_BYTES);
36 .bss : { 48 .bss : {
37 _bss = . ; 49 _bss = . ;
38 *(.bss) 50 *(.bss)
39 *(.bss.*) 51 *(.bss.*)
40 *(COMMON) 52 *(COMMON)
41 . = ALIGN(8); 53 . = ALIGN(8); /* For convenience during zeroing */
42 _end_before_pgt = . ;
43 . = ALIGN(4096);
44 pgtable = . ;
45 . = . + 4096 * 6;
46 _ebss = .; 54 _ebss = .;
47 } 55 }
56#ifdef CONFIG_X86_64
57 . = ALIGN(PAGE_SIZE);
58 .pgtable : {
59 _pgtable = . ;
60 *(.pgtable)
61 _epgtable = . ;
62 }
63#endif
64 _end = .;
48} 65}
diff --git a/arch/x86/boot/compressed/vmlinux.scr b/arch/x86/boot/compressed/vmlinux.scr
deleted file mode 100644
index f02382ae5c48..000000000000
--- a/arch/x86/boot/compressed/vmlinux.scr
+++ /dev/null
@@ -1,10 +0,0 @@
1SECTIONS
2{
3 .rodata.compressed : {
4 input_len = .;
5 LONG(input_data_end - input_data) input_data = .;
6 *(.data)
7 output_len = . - 4;
8 input_data_end = .;
9 }
10}
diff --git a/arch/x86/boot/compressed/vmlinux_32.lds b/arch/x86/boot/compressed/vmlinux_32.lds
deleted file mode 100644
index bb3c48379c40..000000000000
--- a/arch/x86/boot/compressed/vmlinux_32.lds
+++ /dev/null
@@ -1,43 +0,0 @@
1OUTPUT_FORMAT("elf32-i386", "elf32-i386", "elf32-i386")
2OUTPUT_ARCH(i386)
3ENTRY(startup_32)
4SECTIONS
5{
6 /* Be careful parts of head_32.S assume startup_32 is at
7 * address 0.
8 */
9 . = 0;
10 .text.head : {
11 _head = . ;
12 *(.text.head)
13 _ehead = . ;
14 }
15 .rodata.compressed : {
16 *(.rodata.compressed)
17 }
18 .text : {
19 _text = .; /* Text */
20 *(.text)
21 *(.text.*)
22 _etext = . ;
23 }
24 .rodata : {
25 _rodata = . ;
26 *(.rodata) /* read-only data */
27 *(.rodata.*)
28 _erodata = . ;
29 }
30 .data : {
31 _data = . ;
32 *(.data)
33 *(.data.*)
34 _edata = . ;
35 }
36 .bss : {
37 _bss = . ;
38 *(.bss)
39 *(.bss.*)
40 *(COMMON)
41 _end = . ;
42 }
43}
diff --git a/arch/x86/boot/edd.c b/arch/x86/boot/edd.c
index 1aae8f3e5ca1..c501a5b466f8 100644
--- a/arch/x86/boot/edd.c
+++ b/arch/x86/boot/edd.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -22,17 +23,17 @@
22 */ 23 */
23static int read_mbr(u8 devno, void *buf) 24static int read_mbr(u8 devno, void *buf)
24{ 25{
25 u16 ax, bx, cx, dx; 26 struct biosregs ireg, oreg;
26 27
27 ax = 0x0201; /* Legacy Read, one sector */ 28 initregs(&ireg);
28 cx = 0x0001; /* Sector 0-0-1 */ 29 ireg.ax = 0x0201; /* Legacy Read, one sector */
29 dx = devno; 30 ireg.cx = 0x0001; /* Sector 0-0-1 */
30 bx = (size_t)buf; 31 ireg.dl = devno;
31 asm volatile("pushfl; stc; int $0x13; setc %%al; popfl" 32 ireg.bx = (size_t)buf;
32 : "+a" (ax), "+c" (cx), "+d" (dx), "+b" (bx)
33 : : "esi", "edi", "memory");
34 33
35 return -(u8)ax; /* 0 or -1 */ 34 intcall(0x13, &ireg, &oreg);
35
36 return -(oreg.eflags & X86_EFLAGS_CF); /* 0 or -1 */
36} 37}
37 38
38static u32 read_mbr_sig(u8 devno, struct edd_info *ei, u32 *mbrsig) 39static u32 read_mbr_sig(u8 devno, struct edd_info *ei, u32 *mbrsig)
@@ -72,56 +73,46 @@ static u32 read_mbr_sig(u8 devno, struct edd_info *ei, u32 *mbrsig)
72 73
73static int get_edd_info(u8 devno, struct edd_info *ei) 74static int get_edd_info(u8 devno, struct edd_info *ei)
74{ 75{
75 u16 ax, bx, cx, dx, di; 76 struct biosregs ireg, oreg;
76 77
77 memset(ei, 0, sizeof *ei); 78 memset(ei, 0, sizeof *ei);
78 79
79 /* Check Extensions Present */ 80 /* Check Extensions Present */
80 81
81 ax = 0x4100; 82 initregs(&ireg);
82 bx = EDDMAGIC1; 83 ireg.ah = 0x41;
83 dx = devno; 84 ireg.bx = EDDMAGIC1;
84 asm("pushfl; stc; int $0x13; setc %%al; popfl" 85 ireg.dl = devno;
85 : "+a" (ax), "+b" (bx), "=c" (cx), "+d" (dx) 86 intcall(0x13, &ireg, &oreg);
86 : : "esi", "edi");
87 87
88 if ((u8)ax) 88 if (oreg.eflags & X86_EFLAGS_CF)
89 return -1; /* No extended information */ 89 return -1; /* No extended information */
90 90
91 if (bx != EDDMAGIC2) 91 if (oreg.bx != EDDMAGIC2)
92 return -1; 92 return -1;
93 93
94 ei->device = devno; 94 ei->device = devno;
95 ei->version = ax >> 8; /* EDD version number */ 95 ei->version = oreg.ah; /* EDD version number */
96 ei->interface_support = cx; /* EDD functionality subsets */ 96 ei->interface_support = oreg.cx; /* EDD functionality subsets */
97 97
98 /* Extended Get Device Parameters */ 98 /* Extended Get Device Parameters */
99 99
100 ei->params.length = sizeof(ei->params); 100 ei->params.length = sizeof(ei->params);
101 ax = 0x4800; 101 ireg.ah = 0x48;
102 dx = devno; 102 ireg.si = (size_t)&ei->params;
103 asm("pushfl; int $0x13; popfl" 103 intcall(0x13, &ireg, &oreg);
104 : "+a" (ax), "+d" (dx), "=m" (ei->params)
105 : "S" (&ei->params)
106 : "ebx", "ecx", "edi");
107 104
108 /* Get legacy CHS parameters */ 105 /* Get legacy CHS parameters */
109 106
110 /* Ralf Brown recommends setting ES:DI to 0:0 */ 107 /* Ralf Brown recommends setting ES:DI to 0:0 */
111 ax = 0x0800; 108 ireg.ah = 0x08;
112 dx = devno; 109 ireg.es = 0;
113 di = 0; 110 intcall(0x13, &ireg, &oreg);
114 asm("pushw %%es; " 111
115 "movw %%di,%%es; " 112 if (!(oreg.eflags & X86_EFLAGS_CF)) {
116 "pushfl; stc; int $0x13; setc %%al; popfl; " 113 ei->legacy_max_cylinder = oreg.ch + ((oreg.cl & 0xc0) << 2);
117 "popw %%es" 114 ei->legacy_max_head = oreg.dh;
118 : "+a" (ax), "=b" (bx), "=c" (cx), "+d" (dx), "+D" (di) 115 ei->legacy_sectors_per_track = oreg.cl & 0x3f;
119 : : "esi");
120
121 if ((u8)ax == 0) {
122 ei->legacy_max_cylinder = (cx >> 8) + ((cx & 0xc0) << 2);
123 ei->legacy_max_head = dx >> 8;
124 ei->legacy_sectors_per_track = cx & 0x3f;
125 } 116 }
126 117
127 return 0; 118 return 0;
diff --git a/arch/x86/boot/header.S b/arch/x86/boot/header.S
index 5d84d1c74e4c..b31cc54b4641 100644
--- a/arch/x86/boot/header.S
+++ b/arch/x86/boot/header.S
@@ -22,7 +22,8 @@
22#include <asm/page_types.h> 22#include <asm/page_types.h>
23#include <asm/setup.h> 23#include <asm/setup.h>
24#include "boot.h" 24#include "boot.h"
25#include "offsets.h" 25#include "voffset.h"
26#include "zoffset.h"
26 27
27BOOTSEG = 0x07C0 /* original address of boot-sector */ 28BOOTSEG = 0x07C0 /* original address of boot-sector */
28SYSSEG = 0x1000 /* historical load address >> 4 */ 29SYSSEG = 0x1000 /* historical load address >> 4 */
@@ -115,7 +116,7 @@ _start:
115 # Part 2 of the header, from the old setup.S 116 # Part 2 of the header, from the old setup.S
116 117
117 .ascii "HdrS" # header signature 118 .ascii "HdrS" # header signature
118 .word 0x0209 # header version number (>= 0x0105) 119 .word 0x020a # header version number (>= 0x0105)
119 # or else old loadlin-1.5 will fail) 120 # or else old loadlin-1.5 will fail)
120 .globl realmode_swtch 121 .globl realmode_swtch
121realmode_swtch: .word 0, 0 # default_switch, SETUPSEG 122realmode_swtch: .word 0, 0 # default_switch, SETUPSEG
@@ -168,7 +169,11 @@ heap_end_ptr: .word _end+STACK_SIZE-512
168 # end of setup code can be used by setup 169 # end of setup code can be used by setup
169 # for local heap purposes. 170 # for local heap purposes.
170 171
171pad1: .word 0 172ext_loader_ver:
173 .byte 0 # Extended boot loader version
174ext_loader_type:
175 .byte 0 # Extended boot loader type
176
172cmd_line_ptr: .long 0 # (Header version 0x0202 or later) 177cmd_line_ptr: .long 0 # (Header version 0x0202 or later)
173 # If nonzero, a 32-bit pointer 178 # If nonzero, a 32-bit pointer
174 # to the kernel command line. 179 # to the kernel command line.
@@ -200,7 +205,7 @@ relocatable_kernel: .byte 1
200#else 205#else
201relocatable_kernel: .byte 0 206relocatable_kernel: .byte 0
202#endif 207#endif
203pad2: .byte 0 208min_alignment: .byte MIN_KERNEL_ALIGN_LG2 # minimum alignment
204pad3: .word 0 209pad3: .word 0
205 210
206cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line, 211cmdline_size: .long COMMAND_LINE_SIZE-1 #length of the command line,
@@ -212,16 +217,27 @@ hardware_subarch: .long 0 # subarchitecture, added with 2.07
212 217
213hardware_subarch_data: .quad 0 218hardware_subarch_data: .quad 0
214 219
215payload_offset: .long input_data 220payload_offset: .long ZO_input_data
216payload_length: .long input_data_end-input_data 221payload_length: .long ZO_z_input_len
217 222
218setup_data: .quad 0 # 64-bit physical pointer to 223setup_data: .quad 0 # 64-bit physical pointer to
219 # single linked list of 224 # single linked list of
220 # struct setup_data 225 # struct setup_data
221 226
227pref_address: .quad LOAD_PHYSICAL_ADDR # preferred load addr
228
229#define ZO_INIT_SIZE (ZO__end - ZO_startup_32 + ZO_z_extract_offset)
230#define VO_INIT_SIZE (VO__end - VO__text)
231#if ZO_INIT_SIZE > VO_INIT_SIZE
232#define INIT_SIZE ZO_INIT_SIZE
233#else
234#define INIT_SIZE VO_INIT_SIZE
235#endif
236init_size: .long INIT_SIZE # kernel initialization size
237
222# End of setup header ##################################################### 238# End of setup header #####################################################
223 239
224 .section ".inittext", "ax" 240 .section ".entrytext", "ax"
225start_of_setup: 241start_of_setup:
226#ifdef SAFE_RESET_DISK_CONTROLLER 242#ifdef SAFE_RESET_DISK_CONTROLLER
227# Reset the disk controller. 243# Reset the disk controller.
diff --git a/arch/x86/boot/main.c b/arch/x86/boot/main.c
index 58f0415d3ae0..140172b895bd 100644
--- a/arch/x86/boot/main.c
+++ b/arch/x86/boot/main.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -61,11 +62,10 @@ static void copy_boot_params(void)
61 */ 62 */
62static void keyboard_set_repeat(void) 63static void keyboard_set_repeat(void)
63{ 64{
64 u16 ax = 0x0305; 65 struct biosregs ireg;
65 u16 bx = 0; 66 initregs(&ireg);
66 asm volatile("int $0x16" 67 ireg.ax = 0x0305;
67 : "+a" (ax), "+b" (bx) 68 intcall(0x16, &ireg, NULL);
68 : : "ecx", "edx", "esi", "edi");
69} 69}
70 70
71/* 71/*
@@ -73,18 +73,22 @@ static void keyboard_set_repeat(void)
73 */ 73 */
74static void query_ist(void) 74static void query_ist(void)
75{ 75{
76 struct biosregs ireg, oreg;
77
76 /* Some older BIOSes apparently crash on this call, so filter 78 /* Some older BIOSes apparently crash on this call, so filter
77 it from machines too old to have SpeedStep at all. */ 79 it from machines too old to have SpeedStep at all. */
78 if (cpu.level < 6) 80 if (cpu.level < 6)
79 return; 81 return;
80 82
81 asm("int $0x15" 83 initregs(&ireg);
82 : "=a" (boot_params.ist_info.signature), 84 ireg.ax = 0xe980; /* IST Support */
83 "=b" (boot_params.ist_info.command), 85 ireg.edx = 0x47534943; /* Request value */
84 "=c" (boot_params.ist_info.event), 86 intcall(0x15, &ireg, &oreg);
85 "=d" (boot_params.ist_info.perf_level) 87
86 : "a" (0x0000e980), /* IST Support */ 88 boot_params.ist_info.signature = oreg.eax;
87 "d" (0x47534943)); /* Request value */ 89 boot_params.ist_info.command = oreg.ebx;
90 boot_params.ist_info.event = oreg.ecx;
91 boot_params.ist_info.perf_level = oreg.edx;
88} 92}
89 93
90/* 94/*
@@ -93,13 +97,12 @@ static void query_ist(void)
93static void set_bios_mode(void) 97static void set_bios_mode(void)
94{ 98{
95#ifdef CONFIG_X86_64 99#ifdef CONFIG_X86_64
96 u32 eax, ebx; 100 struct biosregs ireg;
97 101
98 eax = 0xec00; 102 initregs(&ireg);
99 ebx = 2; 103 ireg.ax = 0xec00;
100 asm volatile("int $0x15" 104 ireg.bx = 2;
101 : "+a" (eax), "+b" (ebx) 105 intcall(0x15, &ireg, NULL);
102 : : "ecx", "edx", "esi", "edi");
103#endif 106#endif
104} 107}
105 108
diff --git a/arch/x86/boot/mca.c b/arch/x86/boot/mca.c
index 911eaae5d696..a95a531148ef 100644
--- a/arch/x86/boot/mca.c
+++ b/arch/x86/boot/mca.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -16,26 +17,22 @@
16 17
17int query_mca(void) 18int query_mca(void)
18{ 19{
19 u8 err; 20 struct biosregs ireg, oreg;
20 u16 es, bx, len; 21 u16 len;
21 22
22 asm("pushw %%es ; " 23 initregs(&ireg);
23 "int $0x15 ; " 24 ireg.ah = 0xc0;
24 "setc %0 ; " 25 intcall(0x15, &ireg, &oreg);
25 "movw %%es, %1 ; " 26
26 "popw %%es" 27 if (oreg.eflags & X86_EFLAGS_CF)
27 : "=acd" (err), "=acdSD" (es), "=b" (bx)
28 : "a" (0xc000));
29
30 if (err)
31 return -1; /* No MCA present */ 28 return -1; /* No MCA present */
32 29
33 set_fs(es); 30 set_fs(oreg.es);
34 len = rdfs16(bx); 31 len = rdfs16(oreg.bx);
35 32
36 if (len > sizeof(boot_params.sys_desc_table)) 33 if (len > sizeof(boot_params.sys_desc_table))
37 len = sizeof(boot_params.sys_desc_table); 34 len = sizeof(boot_params.sys_desc_table);
38 35
39 copy_from_fs(&boot_params.sys_desc_table, bx, len); 36 copy_from_fs(&boot_params.sys_desc_table, oreg.bx, len);
40 return 0; 37 return 0;
41} 38}
diff --git a/arch/x86/boot/memory.c b/arch/x86/boot/memory.c
index 5054c2ddd1a0..cae3feb1035e 100644
--- a/arch/x86/boot/memory.c
+++ b/arch/x86/boot/memory.c
@@ -17,43 +17,41 @@
17 17
18#define SMAP 0x534d4150 /* ASCII "SMAP" */ 18#define SMAP 0x534d4150 /* ASCII "SMAP" */
19 19
20struct e820_ext_entry {
21 struct e820entry std;
22 u32 ext_flags;
23} __attribute__((packed));
24
25static int detect_memory_e820(void) 20static int detect_memory_e820(void)
26{ 21{
27 int count = 0; 22 int count = 0;
28 u32 next = 0; 23 struct biosregs ireg, oreg;
29 u32 size, id, edi;
30 u8 err;
31 struct e820entry *desc = boot_params.e820_map; 24 struct e820entry *desc = boot_params.e820_map;
32 static struct e820_ext_entry buf; /* static so it is zeroed */ 25 static struct e820entry buf; /* static so it is zeroed */
26
27 initregs(&ireg);
28 ireg.ax = 0xe820;
29 ireg.cx = sizeof buf;
30 ireg.edx = SMAP;
31 ireg.di = (size_t)&buf;
33 32
34 /* 33 /*
35 * Set this here so that if the BIOS doesn't change this field 34 * Note: at least one BIOS is known which assumes that the
36 * but still doesn't change %ecx, we're still okay... 35 * buffer pointed to by one e820 call is the same one as
36 * the previous call, and only changes modified fields. Therefore,
37 * we use a temporary buffer and copy the results entry by entry.
38 *
39 * This routine deliberately does not try to account for
40 * ACPI 3+ extended attributes. This is because there are
41 * BIOSes in the field which report zero for the valid bit for
42 * all ranges, and we don't currently make any use of the
43 * other attribute bits. Revisit this if we see the extended
44 * attribute bits deployed in a meaningful way in the future.
37 */ 45 */
38 buf.ext_flags = 1;
39 46
40 do { 47 do {
41 size = sizeof buf; 48 intcall(0x15, &ireg, &oreg);
42 49 ireg.ebx = oreg.ebx; /* for next iteration... */
43 /* Important: %edx and %esi are clobbered by some BIOSes,
44 so they must be either used for the error output
45 or explicitly marked clobbered. Given that, assume there
46 is something out there clobbering %ebp and %edi, too. */
47 asm("pushl %%ebp; int $0x15; popl %%ebp; setc %0"
48 : "=d" (err), "+b" (next), "=a" (id), "+c" (size),
49 "=D" (edi), "+m" (buf)
50 : "D" (&buf), "d" (SMAP), "a" (0xe820)
51 : "esi");
52 50
53 /* BIOSes which terminate the chain with CF = 1 as opposed 51 /* BIOSes which terminate the chain with CF = 1 as opposed
54 to %ebx = 0 don't always report the SMAP signature on 52 to %ebx = 0 don't always report the SMAP signature on
55 the final, failing, probe. */ 53 the final, failing, probe. */
56 if (err) 54 if (oreg.eflags & X86_EFLAGS_CF)
57 break; 55 break;
58 56
59 /* Some BIOSes stop returning SMAP in the middle of 57 /* Some BIOSes stop returning SMAP in the middle of
@@ -61,66 +59,64 @@ static int detect_memory_e820(void)
61 screwed up the map at that point, we might have a 59 screwed up the map at that point, we might have a
62 partial map, the full map, or complete garbage, so 60 partial map, the full map, or complete garbage, so
63 just return failure. */ 61 just return failure. */
64 if (id != SMAP) { 62 if (oreg.eax != SMAP) {
65 count = 0; 63 count = 0;
66 break; 64 break;
67 } 65 }
68 66
69 /* ACPI 3.0 added the extended flags support. If bit 0 67 *desc++ = buf;
70 in the extended flags is zero, we're supposed to simply
71 ignore the entry -- a backwards incompatible change! */
72 if (size > 20 && !(buf.ext_flags & 1))
73 continue;
74
75 *desc++ = buf.std;
76 count++; 68 count++;
77 } while (next && count < ARRAY_SIZE(boot_params.e820_map)); 69 } while (ireg.ebx && count < ARRAY_SIZE(boot_params.e820_map));
78 70
79 return boot_params.e820_entries = count; 71 return boot_params.e820_entries = count;
80} 72}
81 73
82static int detect_memory_e801(void) 74static int detect_memory_e801(void)
83{ 75{
84 u16 ax, bx, cx, dx; 76 struct biosregs ireg, oreg;
85 u8 err;
86 77
87 bx = cx = dx = 0; 78 initregs(&ireg);
88 ax = 0xe801; 79 ireg.ax = 0xe801;
89 asm("stc; int $0x15; setc %0" 80 intcall(0x15, &ireg, &oreg);
90 : "=m" (err), "+a" (ax), "+b" (bx), "+c" (cx), "+d" (dx));
91 81
92 if (err) 82 if (oreg.eflags & X86_EFLAGS_CF)
93 return -1; 83 return -1;
94 84
95 /* Do we really need to do this? */ 85 /* Do we really need to do this? */
96 if (cx || dx) { 86 if (oreg.cx || oreg.dx) {
97 ax = cx; 87 oreg.ax = oreg.cx;
98 bx = dx; 88 oreg.bx = oreg.dx;
99 } 89 }
100 90
101 if (ax > 15*1024) 91 if (oreg.ax > 15*1024) {
102 return -1; /* Bogus! */ 92 return -1; /* Bogus! */
103 93 } else if (oreg.ax == 15*1024) {
104 /* This ignores memory above 16MB if we have a memory hole 94 boot_params.alt_mem_k = (oreg.dx << 6) + oreg.ax;
105 there. If someone actually finds a machine with a memory 95 } else {
106 hole at 16MB and no support for 0E820h they should probably 96 /*
107 generate a fake e820 map. */ 97 * This ignores memory above 16MB if we have a memory
108 boot_params.alt_mem_k = (ax == 15*1024) ? (dx << 6)+ax : ax; 98 * hole there. If someone actually finds a machine
99 * with a memory hole at 16MB and no support for
100 * 0E820h they should probably generate a fake e820
101 * map.
102 */
103 boot_params.alt_mem_k = oreg.ax;
104 }
109 105
110 return 0; 106 return 0;
111} 107}
112 108
113static int detect_memory_88(void) 109static int detect_memory_88(void)
114{ 110{
115 u16 ax; 111 struct biosregs ireg, oreg;
116 u8 err;
117 112
118 ax = 0x8800; 113 initregs(&ireg);
119 asm("stc; int $0x15; setc %0" : "=bcdm" (err), "+a" (ax)); 114 ireg.ah = 0x88;
115 intcall(0x15, &ireg, &oreg);
120 116
121 boot_params.screen_info.ext_mem_k = ax; 117 boot_params.screen_info.ext_mem_k = oreg.ax;
122 118
123 return -err; 119 return -(oreg.eflags & X86_EFLAGS_CF); /* 0 or -1 */
124} 120}
125 121
126int detect_memory(void) 122int detect_memory(void)
diff --git a/arch/x86/boot/regs.c b/arch/x86/boot/regs.c
new file mode 100644
index 000000000000..958019b1cfa5
--- /dev/null
+++ b/arch/x86/boot/regs.c
@@ -0,0 +1,29 @@
1/* -----------------------------------------------------------------------
2 *
3 * Copyright 2009 Intel Corporation; author H. Peter Anvin
4 *
5 * This file is part of the Linux kernel, and is made available under
6 * the terms of the GNU General Public License version 2 or (at your
7 * option) any later version; incorporated herein by reference.
8 *
9 * ----------------------------------------------------------------------- */
10
11/*
12 * Simple helper function for initializing a register set.
13 *
14 * Note that this sets EFLAGS_CF in the input register set; this
15 * makes it easier to catch functions which do nothing but don't
16 * explicitly set CF.
17 */
18
19#include "boot.h"
20
21void initregs(struct biosregs *reg)
22{
23 memset(reg, 0, sizeof *reg);
24 reg->eflags |= X86_EFLAGS_CF;
25 reg->ds = ds();
26 reg->es = ds();
27 reg->fs = fs();
28 reg->gs = gs();
29}
diff --git a/arch/x86/boot/setup.ld b/arch/x86/boot/setup.ld
index bb8dc2de7969..0f6ec455a2b1 100644
--- a/arch/x86/boot/setup.ld
+++ b/arch/x86/boot/setup.ld
@@ -15,8 +15,11 @@ SECTIONS
15 15
16 . = 497; 16 . = 497;
17 .header : { *(.header) } 17 .header : { *(.header) }
18 .entrytext : { *(.entrytext) }
18 .inittext : { *(.inittext) } 19 .inittext : { *(.inittext) }
19 .initdata : { *(.initdata) } 20 .initdata : { *(.initdata) }
21 __end_init = .;
22
20 .text : { *(.text) } 23 .text : { *(.text) }
21 .text32 : { *(.text32) } 24 .text32 : { *(.text32) }
22 25
@@ -52,4 +55,7 @@ SECTIONS
52 55
53 . = ASSERT(_end <= 0x8000, "Setup too big!"); 56 . = ASSERT(_end <= 0x8000, "Setup too big!");
54 . = ASSERT(hdr == 0x1f1, "The setup header has the wrong offset!"); 57 . = ASSERT(hdr == 0x1f1, "The setup header has the wrong offset!");
58 /* Necessary for the very-old-loader check to work... */
59 . = ASSERT(__end_init <= 5*512, "init sections too big!");
60
55} 61}
diff --git a/arch/x86/boot/tty.c b/arch/x86/boot/tty.c
index 7e8e8b25f5f6..01ec69c901c7 100644
--- a/arch/x86/boot/tty.c
+++ b/arch/x86/boot/tty.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -22,24 +23,23 @@
22 23
23void __attribute__((section(".inittext"))) putchar(int ch) 24void __attribute__((section(".inittext"))) putchar(int ch)
24{ 25{
25 unsigned char c = ch; 26 struct biosregs ireg;
26 27
27 if (c == '\n') 28 if (ch == '\n')
28 putchar('\r'); /* \n -> \r\n */ 29 putchar('\r'); /* \n -> \r\n */
29 30
30 /* int $0x10 is known to have bugs involving touching registers 31 initregs(&ireg);
31 it shouldn't. Be extra conservative... */ 32 ireg.bx = 0x0007;
32 asm volatile("pushal; pushw %%ds; int $0x10; popw %%ds; popal" 33 ireg.cx = 0x0001;
33 : : "b" (0x0007), "c" (0x0001), "a" (0x0e00|ch)); 34 ireg.ah = 0x0e;
35 ireg.al = ch;
36 intcall(0x10, &ireg, NULL);
34} 37}
35 38
36void __attribute__((section(".inittext"))) puts(const char *str) 39void __attribute__((section(".inittext"))) puts(const char *str)
37{ 40{
38 int n = 0; 41 while (*str)
39 while (*str) {
40 putchar(*str++); 42 putchar(*str++);
41 n++;
42 }
43} 43}
44 44
45/* 45/*
@@ -49,14 +49,13 @@ void __attribute__((section(".inittext"))) puts(const char *str)
49 49
50static u8 gettime(void) 50static u8 gettime(void)
51{ 51{
52 u16 ax = 0x0200; 52 struct biosregs ireg, oreg;
53 u16 cx, dx;
54 53
55 asm volatile("int $0x1a" 54 initregs(&ireg);
56 : "+a" (ax), "=c" (cx), "=d" (dx) 55 ireg.ah = 0x02;
57 : : "ebx", "esi", "edi"); 56 intcall(0x1a, &ireg, &oreg);
58 57
59 return dx >> 8; 58 return oreg.dh;
60} 59}
61 60
62/* 61/*
@@ -64,19 +63,24 @@ static u8 gettime(void)
64 */ 63 */
65int getchar(void) 64int getchar(void)
66{ 65{
67 u16 ax = 0; 66 struct biosregs ireg, oreg;
68 asm volatile("int $0x16" : "+a" (ax)); 67
68 initregs(&ireg);
69 /* ireg.ah = 0x00; */
70 intcall(0x16, &ireg, &oreg);
69 71
70 return ax & 0xff; 72 return oreg.al;
71} 73}
72 74
73static int kbd_pending(void) 75static int kbd_pending(void)
74{ 76{
75 u8 pending; 77 struct biosregs ireg, oreg;
76 asm volatile("int $0x16; setnz %0" 78
77 : "=qm" (pending) 79 initregs(&ireg);
78 : "a" (0x0100)); 80 ireg.ah = 0x01;
79 return pending; 81 intcall(0x16, &ireg, &oreg);
82
83 return !(oreg.eflags & X86_EFLAGS_ZF);
80} 84}
81 85
82void kbd_flush(void) 86void kbd_flush(void)
diff --git a/arch/x86/boot/video-bios.c b/arch/x86/boot/video-bios.c
index 3fa979c9c363..d660be492363 100644
--- a/arch/x86/boot/video-bios.c
+++ b/arch/x86/boot/video-bios.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -29,21 +30,21 @@ static int bios_set_mode(struct mode_info *mi)
29 30
30static int set_bios_mode(u8 mode) 31static int set_bios_mode(u8 mode)
31{ 32{
32 u16 ax; 33 struct biosregs ireg, oreg;
33 u8 new_mode; 34 u8 new_mode;
34 35
35 ax = mode; /* AH=0x00 Set Video Mode */ 36 initregs(&ireg);
36 asm volatile(INT10 37 ireg.al = mode; /* AH=0x00 Set Video Mode */
37 : "+a" (ax) 38 intcall(0x10, &ireg, NULL);
38 : : "ebx", "ecx", "edx", "esi", "edi");
39 39
40 ax = 0x0f00; /* Get Current Video Mode */ 40
41 asm volatile(INT10 41 ireg.ah = 0x0f; /* Get Current Video Mode */
42 : "+a" (ax) 42 intcall(0x10, &ireg, &oreg);
43 : : "ebx", "ecx", "edx", "esi", "edi");
44 43
45 do_restore = 1; /* Assume video contents were lost */ 44 do_restore = 1; /* Assume video contents were lost */
46 new_mode = ax & 0x7f; /* Not all BIOSes are clean with the top bit */ 45
46 /* Not all BIOSes are clean with the top bit */
47 new_mode = ireg.al & 0x7f;
47 48
48 if (new_mode == mode) 49 if (new_mode == mode)
49 return 0; /* Mode change OK */ 50 return 0; /* Mode change OK */
@@ -53,10 +54,8 @@ static int set_bios_mode(u8 mode)
53 /* Mode setting failed, but we didn't end up where we 54 /* Mode setting failed, but we didn't end up where we
54 started. That's bad. Try to revert to the original 55 started. That's bad. Try to revert to the original
55 video mode. */ 56 video mode. */
56 ax = boot_params.screen_info.orig_video_mode; 57 ireg.ax = boot_params.screen_info.orig_video_mode;
57 asm volatile(INT10 58 intcall(0x10, &ireg, NULL);
58 : "+a" (ax)
59 : : "ebx", "ecx", "edx", "esi", "edi");
60 } 59 }
61#endif 60#endif
62 return -1; 61 return -1;
diff --git a/arch/x86/boot/video-vesa.c b/arch/x86/boot/video-vesa.c
index 4a58c8ce3f69..c700147d6ffb 100644
--- a/arch/x86/boot/video-vesa.c
+++ b/arch/x86/boot/video-vesa.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -31,7 +32,7 @@ static inline void vesa_store_mode_params_graphics(void) {}
31static int vesa_probe(void) 32static int vesa_probe(void)
32{ 33{
33#if defined(CONFIG_VIDEO_VESA) || defined(CONFIG_FIRMWARE_EDID) 34#if defined(CONFIG_VIDEO_VESA) || defined(CONFIG_FIRMWARE_EDID)
34 u16 ax, cx, di; 35 struct biosregs ireg, oreg;
35 u16 mode; 36 u16 mode;
36 addr_t mode_ptr; 37 addr_t mode_ptr;
37 struct mode_info *mi; 38 struct mode_info *mi;
@@ -39,13 +40,12 @@ static int vesa_probe(void)
39 40
40 video_vesa.modes = GET_HEAP(struct mode_info, 0); 41 video_vesa.modes = GET_HEAP(struct mode_info, 0);
41 42
42 ax = 0x4f00; 43 initregs(&ireg);
43 di = (size_t)&vginfo; 44 ireg.ax = 0x4f00;
44 asm(INT10 45 ireg.di = (size_t)&vginfo;
45 : "+a" (ax), "+D" (di), "=m" (vginfo) 46 intcall(0x10, &ireg, &oreg);
46 : : "ebx", "ecx", "edx", "esi");
47 47
48 if (ax != 0x004f || 48 if (ireg.ax != 0x004f ||
49 vginfo.signature != VESA_MAGIC || 49 vginfo.signature != VESA_MAGIC ||
50 vginfo.version < 0x0102) 50 vginfo.version < 0x0102)
51 return 0; /* Not present */ 51 return 0; /* Not present */
@@ -65,14 +65,12 @@ static int vesa_probe(void)
65 65
66 memset(&vminfo, 0, sizeof vminfo); /* Just in case... */ 66 memset(&vminfo, 0, sizeof vminfo); /* Just in case... */
67 67
68 ax = 0x4f01; 68 ireg.ax = 0x4f01;
69 cx = mode; 69 ireg.cx = mode;
70 di = (size_t)&vminfo; 70 ireg.di = (size_t)&vminfo;
71 asm(INT10 71 intcall(0x10, &ireg, &oreg);
72 : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo)
73 : : "ebx", "edx", "esi");
74 72
75 if (ax != 0x004f) 73 if (ireg.ax != 0x004f)
76 continue; 74 continue;
77 75
78 if ((vminfo.mode_attr & 0x15) == 0x05) { 76 if ((vminfo.mode_attr & 0x15) == 0x05) {
@@ -111,20 +109,19 @@ static int vesa_probe(void)
111 109
112static int vesa_set_mode(struct mode_info *mode) 110static int vesa_set_mode(struct mode_info *mode)
113{ 111{
114 u16 ax, bx, cx, di; 112 struct biosregs ireg, oreg;
115 int is_graphic; 113 int is_graphic;
116 u16 vesa_mode = mode->mode - VIDEO_FIRST_VESA; 114 u16 vesa_mode = mode->mode - VIDEO_FIRST_VESA;
117 115
118 memset(&vminfo, 0, sizeof vminfo); /* Just in case... */ 116 memset(&vminfo, 0, sizeof vminfo); /* Just in case... */
119 117
120 ax = 0x4f01; 118 initregs(&ireg);
121 cx = vesa_mode; 119 ireg.ax = 0x4f01;
122 di = (size_t)&vminfo; 120 ireg.cx = vesa_mode;
123 asm(INT10 121 ireg.di = (size_t)&vminfo;
124 : "+a" (ax), "+c" (cx), "+D" (di), "=m" (vminfo) 122 intcall(0x10, &ireg, &oreg);
125 : : "ebx", "edx", "esi");
126 123
127 if (ax != 0x004f) 124 if (oreg.ax != 0x004f)
128 return -1; 125 return -1;
129 126
130 if ((vminfo.mode_attr & 0x15) == 0x05) { 127 if ((vminfo.mode_attr & 0x15) == 0x05) {
@@ -141,14 +138,12 @@ static int vesa_set_mode(struct mode_info *mode)
141 } 138 }
142 139
143 140
144 ax = 0x4f02; 141 initregs(&ireg);
145 bx = vesa_mode; 142 ireg.ax = 0x4f02;
146 di = 0; 143 ireg.bx = vesa_mode;
147 asm volatile(INT10 144 intcall(0x10, &ireg, &oreg);
148 : "+a" (ax), "+b" (bx), "+D" (di)
149 : : "ecx", "edx", "esi");
150 145
151 if (ax != 0x004f) 146 if (oreg.ax != 0x004f)
152 return -1; 147 return -1;
153 148
154 graphic_mode = is_graphic; 149 graphic_mode = is_graphic;
@@ -171,50 +166,45 @@ static int vesa_set_mode(struct mode_info *mode)
171/* Switch DAC to 8-bit mode */ 166/* Switch DAC to 8-bit mode */
172static void vesa_dac_set_8bits(void) 167static void vesa_dac_set_8bits(void)
173{ 168{
169 struct biosregs ireg, oreg;
174 u8 dac_size = 6; 170 u8 dac_size = 6;
175 171
176 /* If possible, switch the DAC to 8-bit mode */ 172 /* If possible, switch the DAC to 8-bit mode */
177 if (vginfo.capabilities & 1) { 173 if (vginfo.capabilities & 1) {
178 u16 ax, bx; 174 initregs(&ireg);
179 175 ireg.ax = 0x4f08;
180 ax = 0x4f08; 176 ireg.bh = 0x08;
181 bx = 0x0800; 177 intcall(0x10, &ireg, &oreg);
182 asm volatile(INT10 178 if (oreg.ax == 0x004f)
183 : "+a" (ax), "+b" (bx) 179 dac_size = oreg.bh;
184 : : "ecx", "edx", "esi", "edi");
185
186 if (ax == 0x004f)
187 dac_size = bx >> 8;
188 } 180 }
189 181
190 /* Set the color sizes to the DAC size, and offsets to 0 */ 182 /* Set the color sizes to the DAC size, and offsets to 0 */
191 boot_params.screen_info.red_size = dac_size; 183 boot_params.screen_info.red_size = dac_size;
192 boot_params.screen_info.green_size = dac_size; 184 boot_params.screen_info.green_size = dac_size;
193 boot_params.screen_info.blue_size = dac_size; 185 boot_params.screen_info.blue_size = dac_size;
194 boot_params.screen_info.rsvd_size = dac_size; 186 boot_params.screen_info.rsvd_size = dac_size;
195 187
196 boot_params.screen_info.red_pos = 0; 188 boot_params.screen_info.red_pos = 0;
197 boot_params.screen_info.green_pos = 0; 189 boot_params.screen_info.green_pos = 0;
198 boot_params.screen_info.blue_pos = 0; 190 boot_params.screen_info.blue_pos = 0;
199 boot_params.screen_info.rsvd_pos = 0; 191 boot_params.screen_info.rsvd_pos = 0;
200} 192}
201 193
202/* Save the VESA protected mode info */ 194/* Save the VESA protected mode info */
203static void vesa_store_pm_info(void) 195static void vesa_store_pm_info(void)
204{ 196{
205 u16 ax, bx, di, es; 197 struct biosregs ireg, oreg;
206 198
207 ax = 0x4f0a; 199 initregs(&ireg);
208 bx = di = 0; 200 ireg.ax = 0x4f0a;
209 asm("pushw %%es; "INT10"; movw %%es,%0; popw %%es" 201 intcall(0x10, &ireg, &oreg);
210 : "=d" (es), "+a" (ax), "+b" (bx), "+D" (di)
211 : : "ecx", "esi");
212 202
213 if (ax != 0x004f) 203 if (oreg.ax != 0x004f)
214 return; 204 return;
215 205
216 boot_params.screen_info.vesapm_seg = es; 206 boot_params.screen_info.vesapm_seg = oreg.es;
217 boot_params.screen_info.vesapm_off = di; 207 boot_params.screen_info.vesapm_off = oreg.di;
218} 208}
219 209
220/* 210/*
@@ -252,7 +242,7 @@ static void vesa_store_mode_params_graphics(void)
252void vesa_store_edid(void) 242void vesa_store_edid(void)
253{ 243{
254#ifdef CONFIG_FIRMWARE_EDID 244#ifdef CONFIG_FIRMWARE_EDID
255 u16 ax, bx, cx, dx, di; 245 struct biosregs ireg, oreg;
256 246
257 /* Apparently used as a nonsense token... */ 247 /* Apparently used as a nonsense token... */
258 memset(&boot_params.edid_info, 0x13, sizeof boot_params.edid_info); 248 memset(&boot_params.edid_info, 0x13, sizeof boot_params.edid_info);
@@ -260,33 +250,26 @@ void vesa_store_edid(void)
260 if (vginfo.version < 0x0200) 250 if (vginfo.version < 0x0200)
261 return; /* EDID requires VBE 2.0+ */ 251 return; /* EDID requires VBE 2.0+ */
262 252
263 ax = 0x4f15; /* VBE DDC */ 253 initregs(&ireg);
264 bx = 0x0000; /* Report DDC capabilities */ 254 ireg.ax = 0x4f15; /* VBE DDC */
265 cx = 0; /* Controller 0 */ 255 /* ireg.bx = 0x0000; */ /* Report DDC capabilities */
266 di = 0; /* ES:DI must be 0 by spec */ 256 /* ireg.cx = 0; */ /* Controller 0 */
267 257 ireg.es = 0; /* ES:DI must be 0 by spec */
268 /* Note: The VBE DDC spec is different from the main VESA spec; 258 intcall(0x10, &ireg, &oreg);
269 we genuinely have to assume all registers are destroyed here. */
270
271 asm("pushw %%es; movw %2,%%es; "INT10"; popw %%es"
272 : "+a" (ax), "+b" (bx), "+c" (cx), "+D" (di)
273 : : "esi", "edx");
274 259
275 if (ax != 0x004f) 260 if (oreg.ax != 0x004f)
276 return; /* No EDID */ 261 return; /* No EDID */
277 262
278 /* BH = time in seconds to transfer EDD information */ 263 /* BH = time in seconds to transfer EDD information */
279 /* BL = DDC level supported */ 264 /* BL = DDC level supported */
280 265
281 ax = 0x4f15; /* VBE DDC */ 266 ireg.ax = 0x4f15; /* VBE DDC */
282 bx = 0x0001; /* Read EDID */ 267 ireg.bx = 0x0001; /* Read EDID */
283 cx = 0; /* Controller 0 */ 268 /* ireg.cx = 0; */ /* Controller 0 */
284 dx = 0; /* EDID block number */ 269 /* ireg.dx = 0; */ /* EDID block number */
285 di =(size_t) &boot_params.edid_info; /* (ES:)Pointer to block */ 270 ireg.es = ds();
286 asm(INT10 271 ireg.di =(size_t)&boot_params.edid_info; /* (ES:)Pointer to block */
287 : "+a" (ax), "+b" (bx), "+d" (dx), "=m" (boot_params.edid_info), 272 intcall(0x10, &ireg, &oreg);
288 "+c" (cx), "+D" (di)
289 : : "esi");
290#endif /* CONFIG_FIRMWARE_EDID */ 273#endif /* CONFIG_FIRMWARE_EDID */
291} 274}
292 275
diff --git a/arch/x86/boot/video-vga.c b/arch/x86/boot/video-vga.c
index 9e0587a37768..8f8d827e254d 100644
--- a/arch/x86/boot/video-vga.c
+++ b/arch/x86/boot/video-vga.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -39,30 +40,30 @@ static __videocard video_vga;
39/* Set basic 80x25 mode */ 40/* Set basic 80x25 mode */
40static u8 vga_set_basic_mode(void) 41static u8 vga_set_basic_mode(void)
41{ 42{
43 struct biosregs ireg, oreg;
42 u16 ax; 44 u16 ax;
43 u8 rows; 45 u8 rows;
44 u8 mode; 46 u8 mode;
45 47
48 initregs(&ireg);
49
46#ifdef CONFIG_VIDEO_400_HACK 50#ifdef CONFIG_VIDEO_400_HACK
47 if (adapter >= ADAPTER_VGA) { 51 if (adapter >= ADAPTER_VGA) {
48 asm volatile(INT10 52 ireg.ax = 0x1202;
49 : : "a" (0x1202), "b" (0x0030) 53 ireg.bx = 0x0030;
50 : "ecx", "edx", "esi", "edi"); 54 intcall(0x10, &ireg, NULL);
51 } 55 }
52#endif 56#endif
53 57
54 ax = 0x0f00; 58 ax = 0x0f00;
55 asm volatile(INT10 59 intcall(0x10, &ireg, &oreg);
56 : "+a" (ax) 60 mode = oreg.al;
57 : : "ebx", "ecx", "edx", "esi", "edi");
58
59 mode = (u8)ax;
60 61
61 set_fs(0); 62 set_fs(0);
62 rows = rdfs8(0x484); /* rows minus one */ 63 rows = rdfs8(0x484); /* rows minus one */
63 64
64#ifndef CONFIG_VIDEO_400_HACK 65#ifndef CONFIG_VIDEO_400_HACK
65 if ((ax == 0x5003 || ax == 0x5007) && 66 if ((oreg.ax == 0x5003 || oreg.ax == 0x5007) &&
66 (rows == 0 || rows == 24)) 67 (rows == 0 || rows == 24))
67 return mode; 68 return mode;
68#endif 69#endif
@@ -71,10 +72,8 @@ static u8 vga_set_basic_mode(void)
71 mode = 3; 72 mode = 3;
72 73
73 /* Set the mode */ 74 /* Set the mode */
74 ax = mode; 75 ireg.ax = mode; /* AH=0: set mode */
75 asm volatile(INT10 76 intcall(0x10, &ireg, NULL);
76 : "+a" (ax)
77 : : "ebx", "ecx", "edx", "esi", "edi");
78 do_restore = 1; 77 do_restore = 1;
79 return mode; 78 return mode;
80} 79}
@@ -82,43 +81,69 @@ static u8 vga_set_basic_mode(void)
82static void vga_set_8font(void) 81static void vga_set_8font(void)
83{ 82{
84 /* Set 8x8 font - 80x43 on EGA, 80x50 on VGA */ 83 /* Set 8x8 font - 80x43 on EGA, 80x50 on VGA */
84 struct biosregs ireg;
85
86 initregs(&ireg);
85 87
86 /* Set 8x8 font */ 88 /* Set 8x8 font */
87 asm volatile(INT10 : : "a" (0x1112), "b" (0)); 89 ireg.ax = 0x1112;
90 /* ireg.bl = 0; */
91 intcall(0x10, &ireg, NULL);
88 92
89 /* Use alternate print screen */ 93 /* Use alternate print screen */
90 asm volatile(INT10 : : "a" (0x1200), "b" (0x20)); 94 ireg.ax = 0x1200;
95 ireg.bl = 0x20;
96 intcall(0x10, &ireg, NULL);
91 97
92 /* Turn off cursor emulation */ 98 /* Turn off cursor emulation */
93 asm volatile(INT10 : : "a" (0x1201), "b" (0x34)); 99 ireg.ax = 0x1201;
100 ireg.bl = 0x34;
101 intcall(0x10, &ireg, NULL);
94 102
95 /* Cursor is scan lines 6-7 */ 103 /* Cursor is scan lines 6-7 */
96 asm volatile(INT10 : : "a" (0x0100), "c" (0x0607)); 104 ireg.ax = 0x0100;
105 ireg.cx = 0x0607;
106 intcall(0x10, &ireg, NULL);
97} 107}
98 108
99static void vga_set_14font(void) 109static void vga_set_14font(void)
100{ 110{
101 /* Set 9x14 font - 80x28 on VGA */ 111 /* Set 9x14 font - 80x28 on VGA */
112 struct biosregs ireg;
113
114 initregs(&ireg);
102 115
103 /* Set 9x14 font */ 116 /* Set 9x14 font */
104 asm volatile(INT10 : : "a" (0x1111), "b" (0)); 117 ireg.ax = 0x1111;
118 /* ireg.bl = 0; */
119 intcall(0x10, &ireg, NULL);
105 120
106 /* Turn off cursor emulation */ 121 /* Turn off cursor emulation */
107 asm volatile(INT10 : : "a" (0x1201), "b" (0x34)); 122 ireg.ax = 0x1201;
123 ireg.bl = 0x34;
124 intcall(0x10, &ireg, NULL);
108 125
109 /* Cursor is scan lines 11-12 */ 126 /* Cursor is scan lines 11-12 */
110 asm volatile(INT10 : : "a" (0x0100), "c" (0x0b0c)); 127 ireg.ax = 0x0100;
128 ireg.cx = 0x0b0c;
129 intcall(0x10, &ireg, NULL);
111} 130}
112 131
113static void vga_set_80x43(void) 132static void vga_set_80x43(void)
114{ 133{
115 /* Set 80x43 mode on VGA (not EGA) */ 134 /* Set 80x43 mode on VGA (not EGA) */
135 struct biosregs ireg;
136
137 initregs(&ireg);
116 138
117 /* Set 350 scans */ 139 /* Set 350 scans */
118 asm volatile(INT10 : : "a" (0x1201), "b" (0x30)); 140 ireg.ax = 0x1201;
141 ireg.bl = 0x30;
142 intcall(0x10, &ireg, NULL);
119 143
120 /* Reset video mode */ 144 /* Reset video mode */
121 asm volatile(INT10 : : "a" (0x0003)); 145 ireg.ax = 0x0003;
146 intcall(0x10, &ireg, NULL);
122 147
123 vga_set_8font(); 148 vga_set_8font();
124} 149}
@@ -225,8 +250,6 @@ static int vga_set_mode(struct mode_info *mode)
225 */ 250 */
226static int vga_probe(void) 251static int vga_probe(void)
227{ 252{
228 u16 ega_bx;
229
230 static const char *card_name[] = { 253 static const char *card_name[] = {
231 "CGA/MDA/HGC", "EGA", "VGA" 254 "CGA/MDA/HGC", "EGA", "VGA"
232 }; 255 };
@@ -240,26 +263,26 @@ static int vga_probe(void)
240 sizeof(ega_modes)/sizeof(struct mode_info), 263 sizeof(ega_modes)/sizeof(struct mode_info),
241 sizeof(vga_modes)/sizeof(struct mode_info), 264 sizeof(vga_modes)/sizeof(struct mode_info),
242 }; 265 };
243 u8 vga_flag;
244 266
245 asm(INT10 267 struct biosregs ireg, oreg;
246 : "=b" (ega_bx) 268
247 : "a" (0x1200), "b" (0x10) /* Check EGA/VGA */ 269 initregs(&ireg);
248 : "ecx", "edx", "esi", "edi"); 270
271 ireg.ax = 0x1200;
272 ireg.bl = 0x10; /* Check EGA/VGA */
273 intcall(0x10, &ireg, &oreg);
249 274
250#ifndef _WAKEUP 275#ifndef _WAKEUP
251 boot_params.screen_info.orig_video_ega_bx = ega_bx; 276 boot_params.screen_info.orig_video_ega_bx = oreg.bx;
252#endif 277#endif
253 278
254 /* If we have MDA/CGA/HGC then BL will be unchanged at 0x10 */ 279 /* If we have MDA/CGA/HGC then BL will be unchanged at 0x10 */
255 if ((u8)ega_bx != 0x10) { 280 if (oreg.bl != 0x10) {
256 /* EGA/VGA */ 281 /* EGA/VGA */
257 asm(INT10 282 ireg.ax = 0x1a00;
258 : "=a" (vga_flag) 283 intcall(0x10, &ireg, &oreg);
259 : "a" (0x1a00)
260 : "ebx", "ecx", "edx", "esi", "edi");
261 284
262 if (vga_flag == 0x1a) { 285 if (oreg.al == 0x1a) {
263 adapter = ADAPTER_VGA; 286 adapter = ADAPTER_VGA;
264#ifndef _WAKEUP 287#ifndef _WAKEUP
265 boot_params.screen_info.orig_video_isVGA = 1; 288 boot_params.screen_info.orig_video_isVGA = 1;
diff --git a/arch/x86/boot/video.c b/arch/x86/boot/video.c
index 3bef2c1febe9..bad728b76fc2 100644
--- a/arch/x86/boot/video.c
+++ b/arch/x86/boot/video.c
@@ -2,6 +2,7 @@
2 * 2 *
3 * Copyright (C) 1991, 1992 Linus Torvalds 3 * Copyright (C) 1991, 1992 Linus Torvalds
4 * Copyright 2007 rPath, Inc. - All Rights Reserved 4 * Copyright 2007 rPath, Inc. - All Rights Reserved
5 * Copyright 2009 Intel Corporation; author H. Peter Anvin
5 * 6 *
6 * This file is part of the Linux kernel, and is made available under 7 * This file is part of the Linux kernel, and is made available under
7 * the terms of the GNU General Public License version 2. 8 * the terms of the GNU General Public License version 2.
@@ -18,33 +19,29 @@
18 19
19static void store_cursor_position(void) 20static void store_cursor_position(void)
20{ 21{
21 u16 curpos; 22 struct biosregs ireg, oreg;
22 u16 ax, bx;
23 23
24 ax = 0x0300; 24 initregs(&ireg);
25 bx = 0; 25 ireg.ah = 0x03;
26 asm(INT10 26 intcall(0x10, &ireg, &oreg);
27 : "=d" (curpos), "+a" (ax), "+b" (bx)
28 : : "ecx", "esi", "edi");
29 27
30 boot_params.screen_info.orig_x = curpos; 28 boot_params.screen_info.orig_x = oreg.dl;
31 boot_params.screen_info.orig_y = curpos >> 8; 29 boot_params.screen_info.orig_y = oreg.dh;
32} 30}
33 31
34static void store_video_mode(void) 32static void store_video_mode(void)
35{ 33{
36 u16 ax, page; 34 struct biosregs ireg, oreg;
37 35
38 /* N.B.: the saving of the video page here is a bit silly, 36 /* N.B.: the saving of the video page here is a bit silly,
39 since we pretty much assume page 0 everywhere. */ 37 since we pretty much assume page 0 everywhere. */
40 ax = 0x0f00; 38 initregs(&ireg);
41 asm(INT10 39 ireg.ah = 0x0f;
42 : "+a" (ax), "=b" (page) 40 intcall(0x10, &ireg, &oreg);
43 : : "ecx", "edx", "esi", "edi");
44 41
45 /* Not all BIOSes are clean with respect to the top bit */ 42 /* Not all BIOSes are clean with respect to the top bit */
46 boot_params.screen_info.orig_video_mode = ax & 0x7f; 43 boot_params.screen_info.orig_video_mode = oreg.al & 0x7f;
47 boot_params.screen_info.orig_video_page = page >> 8; 44 boot_params.screen_info.orig_video_page = oreg.bh;
48} 45}
49 46
50/* 47/*
@@ -257,7 +254,7 @@ static void restore_screen(void)
257 int y; 254 int y;
258 addr_t dst = 0; 255 addr_t dst = 0;
259 u16 *src = saved.data; 256 u16 *src = saved.data;
260 u16 ax, bx, dx; 257 struct biosregs ireg;
261 258
262 if (graphic_mode) 259 if (graphic_mode)
263 return; /* Can't restore onto a graphic mode */ 260 return; /* Can't restore onto a graphic mode */
@@ -296,12 +293,11 @@ static void restore_screen(void)
296 } 293 }
297 294
298 /* Restore cursor position */ 295 /* Restore cursor position */
299 ax = 0x0200; /* Set cursor position */ 296 initregs(&ireg);
300 bx = 0; /* Page number (<< 8) */ 297 ireg.ah = 0x02; /* Set cursor position */
301 dx = (saved.cury << 8)+saved.curx; 298 ireg.dh = saved.cury;
302 asm volatile(INT10 299 ireg.dl = saved.curx;
303 : "+a" (ax), "+b" (bx), "+d" (dx) 300 intcall(0x10, &ireg, NULL);
304 : : "ecx", "esi", "edi");
305} 301}
306#else 302#else
307#define save_screen() ((void)0) 303#define save_screen() ((void)0)
diff --git a/arch/x86/boot/video.h b/arch/x86/boot/video.h
index ee63f5d14461..5bb174a997fc 100644
--- a/arch/x86/boot/video.h
+++ b/arch/x86/boot/video.h
@@ -112,20 +112,6 @@ extern int force_x, force_y; /* Don't query the BIOS for cols/rows */
112extern int do_restore; /* Restore screen contents */ 112extern int do_restore; /* Restore screen contents */
113extern int graphic_mode; /* Graphics mode with linear frame buffer */ 113extern int graphic_mode; /* Graphics mode with linear frame buffer */
114 114
115/*
116 * int $0x10 is notorious for touching registers it shouldn't.
117 * gcc doesn't like %ebp being clobbered, so define it as a push/pop
118 * sequence here.
119 *
120 * A number of systems, including the original PC can clobber %bp in
121 * certain circumstances, like when scrolling. There exists at least
122 * one Trident video card which could clobber DS under a set of
123 * circumstances that we are unlikely to encounter (scrolling when
124 * using an extended graphics mode of more than 800x600 pixels), but
125 * it's cheap insurance to deal with that here.
126 */
127#define INT10 "pushl %%ebp; pushw %%ds; int $0x10; popw %%ds; popl %%ebp"
128
129/* Accessing VGA indexed registers */ 115/* Accessing VGA indexed registers */
130static inline u8 in_idx(u16 port, u8 index) 116static inline u8 in_idx(u16 port, u8 index)
131{ 117{
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 06:50:29 -0500