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authorWu Zhangjin <wuzhangjin@gmail.com>2009-10-14 06:12:16 -0400
committerRalf Baechle <ralf@linux-mips.org>2009-12-16 20:56:56 -0500
commit1b93b3c3e94be2605759735a89fc935ba5f58dcf (patch)
tree1d49ea7cca709e0380d5463357deb1c632308cc0 /arch/mips/boot
parentbea4c899f2b5fad80099aea979780ef19f9b1987 (diff)
MIPS: Add support for GZIP / BZIP2 / LZMA compressed kernel images
This patch helps to generate smaller kernel images for linux-MIPS, Here is the effect when using lzma: $ ls -sh vmlinux 7.1M vmlinux $ ls -sh vmlinuz 1.5M vmlinuz Have tested the 32bit kernel on Qemu/Malta and 64bit kernel on FuLoong Mini PC. both of them work well. and also, tested by Alexander Clouter on an AR7 based Linksys WAG54Gv2, and by Manuel Lauss on an Alchemy board. This -v2 version incorporate the feedback from Ralf, and add the following changes: 1. add .ecoff, .bin, .erec format support 2. only enable it and the debug source code for the machines we tested 3. a dozen of fixups and cleanups and if you want to enable it for your board, please try to select SYS_SUPPORTS_ZBOOT for it, and if the board have an 16550 compatible uart, you can select SYS_SUPPORTS_ZBOOT_UART16550 directly. and then sending the relative patches to Ralf. Tested-by: Manuel Lauss <manuel.lauss@googlemail.com> Tested-by: Alexander Clouter <alex@digriz.org.uk> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/boot')
-rw-r--r--arch/mips/boot/compressed/Makefile100
-rw-r--r--arch/mips/boot/compressed/dbg.c37
-rw-r--r--arch/mips/boot/compressed/decompress.c126
-rw-r--r--arch/mips/boot/compressed/dummy.c4
-rw-r--r--arch/mips/boot/compressed/head.S56
-rw-r--r--arch/mips/boot/compressed/ld.script150
-rw-r--r--arch/mips/boot/compressed/uart-16550.c43
7 files changed, 516 insertions, 0 deletions
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
new file mode 100644
index 000000000000..e27f40bbd4e5
--- /dev/null
+++ b/arch/mips/boot/compressed/Makefile
@@ -0,0 +1,100 @@
1#
2# This file is subject to the terms and conditions of the GNU General Public
3# License.
4#
5# Adapted for MIPS Pete Popov, Dan Malek
6#
7# Copyright (C) 1994 by Linus Torvalds
8# Adapted for PowerPC by Gary Thomas
9# modified by Cort (cort@cs.nmt.edu)
10#
11# Copyright (C) 2009 Lemote Inc. & DSLab, Lanzhou University
12# Author: Wu Zhangjin <wuzj@lemote.com>
13#
14
15# compressed kernel load addr: VMLINUZ_LOAD_ADDRESS > VMLINUX_LOAD_ADDRESS + VMLINUX_SIZE
16VMLINUX_SIZE := $(shell wc -c $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | cut -d' ' -f1)
17VMLINUX_SIZE := $(shell [ -n "$(VMLINUX_SIZE)" ] && echo $$(($(VMLINUX_SIZE) + (65536 - $(VMLINUX_SIZE) % 65536))))
18VMLINUZ_LOAD_ADDRESS := 0x$(shell [ -n "$(VMLINUX_SIZE)" ] && printf %x $$(($(VMLINUX_LOAD_ADDRESS) + $(VMLINUX_SIZE))))
19
20# set the default size of the mallocing area for decompressing
21BOOT_HEAP_SIZE := 0x400000
22
23# Disable Function Tracer
24KBUILD_CFLAGS := $(shell echo $(KBUILD_CFLAGS) | sed -e "s/-pg//")
25
26KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
27 -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull" \
28
29KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
30 -DKERNEL_ENTRY=0x$(shell $(NM) $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | grep " kernel_entry" | cut -f1 -d \ ) \
31 -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE)
32
33obj-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
34
35obj-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
36
37OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
38$(obj)/vmlinux.bin: $(KBUILD_IMAGE)
39 $(call if_changed,objcopy)
40
41suffix_$(CONFIG_KERNEL_GZIP) = gz
42suffix_$(CONFIG_KERNEL_BZIP2) = bz2
43suffix_$(CONFIG_KERNEL_LZMA) = lzma
44tool_$(CONFIG_KERNEL_GZIP) = gzip
45tool_$(CONFIG_KERNEL_BZIP2) = bzip2
46tool_$(CONFIG_KERNEL_LZMA) = lzma
47$(obj)/vmlinux.$(suffix_y): $(obj)/vmlinux.bin
48 $(call if_changed,$(tool_y))
49
50$(obj)/piggy.o: $(obj)/vmlinux.$(suffix_y) $(obj)/dummy.o
51 $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) \
52 --add-section=.image=$< \
53 --set-section-flags=.image=contents,alloc,load,readonly,data \
54 $(obj)/dummy.o $@
55
56LDFLAGS_vmlinuz := $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T
57vmlinuz: $(src)/ld.script $(obj-y) $(obj)/piggy.o
58 $(call if_changed,ld)
59 $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) -R .comment -R .stab -R .stabstr -R .initrd -R .sysmap $@
60
61#
62# Some DECstations need all possible sections of an ECOFF executable
63#
64ifdef CONFIG_MACH_DECSTATION
65 E2EFLAGS = -a
66else
67 E2EFLAGS =
68endif
69
70# elf2ecoff can only handle 32bit image
71
72ifdef CONFIG_32BIT
73 VMLINUZ = vmlinuz
74else
75 VMLINUZ = vmlinuz.32
76endif
77
78vmlinuz.32: vmlinuz
79 $(Q)$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
80
81vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
82 $(Q)$(obj)/../elf2ecoff $(VMLINUZ) vmlinuz.ecoff $(E2EFLAGS)
83
84$(obj)/../elf2ecoff: $(src)/../elf2ecoff.c
85 $(Q)$(HOSTCC) -o $@ $^
86
87drop-sections = .reginfo .mdebug .comment .note .pdr .options .MIPS.options
88strip-flags = $(addprefix --remove-section=,$(drop-sections))
89
90OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary $(strip-flags)
91vmlinuz.bin: vmlinuz
92 $(call if_changed,objcopy)
93
94OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec $(strip-flags)
95vmlinuz.srec: vmlinuz
96 $(call if_changed,objcopy)
97
98clean:
99clean-files += *.o \
100 vmlinu*
diff --git a/arch/mips/boot/compressed/dbg.c b/arch/mips/boot/compressed/dbg.c
new file mode 100644
index 000000000000..ff4dc7a33a9f
--- /dev/null
+++ b/arch/mips/boot/compressed/dbg.c
@@ -0,0 +1,37 @@
1/*
2 * MIPS-specific debug support for pre-boot environment
3 *
4 * NOTE: putc() is board specific, if your board have a 16550 compatible uart,
5 * please select SYS_SUPPORTS_ZBOOT_UART16550 for your machine. othewise, you
6 * need to implement your own putc().
7 */
8
9#include <linux/init.h>
10#include <linux/types.h>
11
12void __attribute__ ((weak)) putc(char c)
13{
14}
15
16void puts(const char *s)
17{
18 char c;
19 while ((c = *s++) != '\0') {
20 putc(c);
21 if (c == '\n')
22 putc('\r');
23 }
24}
25
26void puthex(unsigned long long val)
27{
28
29 unsigned char buf[10];
30 int i;
31 for (i = 7; i >= 0; i--) {
32 buf[i] = "0123456789ABCDEF"[val & 0x0F];
33 val >>= 4;
34 }
35 buf[8] = '\0';
36 puts(buf);
37}
diff --git a/arch/mips/boot/compressed/decompress.c b/arch/mips/boot/compressed/decompress.c
new file mode 100644
index 000000000000..67330c2f7318
--- /dev/null
+++ b/arch/mips/boot/compressed/decompress.c
@@ -0,0 +1,126 @@
1/*
2 * Misc. bootloader code for many machines.
3 *
4 * Copyright 2001 MontaVista Software Inc.
5 * Author: Matt Porter <mporter@mvista.com> Derived from
6 * arch/ppc/boot/prep/misc.c
7 *
8 * Copyright (C) 2009 Lemote, Inc. & Institute of Computing Technology
9 * Author: Wu Zhangjin <wuzj@lemote.com>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 */
16
17#include <linux/types.h>
18#include <linux/kernel.h>
19
20#include <asm/addrspace.h>
21
22/* These two variables specify the free mem region
23 * that can be used for temporary malloc area
24 */
25unsigned long free_mem_ptr;
26unsigned long free_mem_end_ptr;
27char *zimage_start;
28
29/* The linker tells us where the image is. */
30extern unsigned char __image_begin, __image_end;
31extern unsigned char __ramdisk_begin, __ramdisk_end;
32unsigned long initrd_size;
33
34/* debug interfaces */
35extern void puts(const char *s);
36extern void puthex(unsigned long long val);
37
38void error(char *x)
39{
40 puts("\n\n");
41 puts(x);
42 puts("\n\n -- System halted");
43
44 while (1)
45 ; /* Halt */
46}
47
48/* activate the code for pre-boot environment */
49#define STATIC static
50
51#ifdef CONFIG_KERNEL_GZIP
52void *memcpy(void *dest, const void *src, size_t n)
53{
54 int i;
55 const char *s = src;
56 char *d = dest;
57
58 for (i = 0; i < n; i++)
59 d[i] = s[i];
60 return dest;
61}
62#include "../../../../lib/decompress_inflate.c"
63#endif
64
65#ifdef CONFIG_KERNEL_BZIP2
66void *memset(void *s, int c, size_t n)
67{
68 int i;
69 char *ss = s;
70
71 for (i = 0; i < n; i++)
72 ss[i] = c;
73 return s;
74}
75#include "../../../../lib/decompress_bunzip2.c"
76#endif
77
78#ifdef CONFIG_KERNEL_LZMA
79#include "../../../../lib/decompress_unlzma.c"
80#endif
81
82void decompress_kernel(unsigned long boot_heap_start)
83{
84 int zimage_size;
85
86 /*
87 * We link ourself to an arbitrary low address. When we run, we
88 * relocate outself to that address. __image_beign points to
89 * the part of the image where the zImage is. -- Tom
90 */
91 zimage_start = (char *)(unsigned long)(&__image_begin);
92 zimage_size = (unsigned long)(&__image_end) -
93 (unsigned long)(&__image_begin);
94
95 /*
96 * The zImage and initrd will be between start and _end, so they've
97 * already been moved once. We're good to go now. -- Tom
98 */
99 puts("zimage at: ");
100 puthex((unsigned long)zimage_start);
101 puts(" ");
102 puthex((unsigned long)(zimage_size + zimage_start));
103 puts("\n");
104
105 if (initrd_size) {
106 puts("initrd at: ");
107 puthex((unsigned long)(&__ramdisk_begin));
108 puts(" ");
109 puthex((unsigned long)(&__ramdisk_end));
110 puts("\n");
111 }
112
113 /* this area are prepared for mallocing when decompressing */
114 free_mem_ptr = boot_heap_start;
115 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
116
117 /* Display standard Linux/MIPS boot prompt for kernel args */
118 puts("Uncompressing Linux at load address ");
119 puthex(VMLINUX_LOAD_ADDRESS_ULL);
120 puts("\n");
121 /* Decompress the kernel with according algorithm */
122 decompress(zimage_start, zimage_size, 0, 0,
123 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
124 /* FIXME: is there a need to flush cache here? */
125 puts("Now, booting the kernel...\n");
126}
diff --git a/arch/mips/boot/compressed/dummy.c b/arch/mips/boot/compressed/dummy.c
new file mode 100644
index 000000000000..31dbf45bf99c
--- /dev/null
+++ b/arch/mips/boot/compressed/dummy.c
@@ -0,0 +1,4 @@
1int main(void)
2{
3 return 0;
4}
diff --git a/arch/mips/boot/compressed/head.S b/arch/mips/boot/compressed/head.S
new file mode 100644
index 000000000000..4e65a8420bee
--- /dev/null
+++ b/arch/mips/boot/compressed/head.S
@@ -0,0 +1,56 @@
1/*
2 * This file is subject to the terms and conditions of the GNU General Public
3 * License. See the file "COPYING" in the main directory of this archive
4 * for more details.
5 *
6 * Copyright (C) 1994, 1995 Waldorf Electronics
7 * Written by Ralf Baechle and Andreas Busse
8 * Copyright (C) 1995 - 1999 Ralf Baechle
9 * Copyright (C) 1996 Paul M. Antoine
10 * Modified for DECStation and hence R3000 support by Paul M. Antoine
11 * Further modifications by David S. Miller and Harald Koerfgen
12 * Copyright (C) 1999 Silicon Graphics, Inc.
13 */
14
15#include <asm/asm.h>
16#include <asm/regdef.h>
17
18 .set noreorder
19 .cprestore
20 LEAF(start)
21start:
22 /* Save boot rom start args */
23 move s0, a0
24 move s1, a1
25 move s2, a2
26 move s3, a3
27
28 /* Clear BSS */
29 PTR_LA a0, _edata
30 PTR_LA a2, _end
311: sw zero, 0(a0)
32 bne a2, a0, 1b
33 addiu a0, a0, 4
34
35 PTR_LA a0, (.heap) /* heap address */
36 PTR_LA sp, (.stack + 8192) /* stack address */
37
38 PTR_LA ra, 2f
39 PTR_LA k0, decompress_kernel
40 jr k0
41 nop
422:
43 move a0, s0
44 move a1, s1
45 move a2, s2
46 move a3, s3
47 PTR_LI k0, KERNEL_ENTRY
48 jr k0
49 nop
503:
51 b 3b
52 nop
53 END(start)
54
55 .comm .heap,BOOT_HEAP_SIZE,4
56 .comm .stack,4096*2,4
diff --git a/arch/mips/boot/compressed/ld.script b/arch/mips/boot/compressed/ld.script
new file mode 100644
index 000000000000..29e9f4c0d5d8
--- /dev/null
+++ b/arch/mips/boot/compressed/ld.script
@@ -0,0 +1,150 @@
1OUTPUT_ARCH(mips)
2ENTRY(start)
3SECTIONS
4{
5 /* Read-only sections, merged into text segment: */
6 .init : { *(.init) } =0
7 .text :
8 {
9 _ftext = . ;
10 *(.text)
11 *(.rodata)
12 *(.rodata1)
13 /* .gnu.warning sections are handled specially by elf32.em. */
14 *(.gnu.warning)
15 } =0
16 .kstrtab : { *(.kstrtab) }
17
18 . = ALIGN(16); /* Exception table */
19 __start___ex_table = .;
20 __ex_table : { *(__ex_table) }
21 __stop___ex_table = .;
22
23 __start___dbe_table = .; /* Exception table for data bus errors */
24 __dbe_table : { *(__dbe_table) }
25 __stop___dbe_table = .;
26
27 __start___ksymtab = .; /* Kernel symbol table */
28 __ksymtab : { *(__ksymtab) }
29 __stop___ksymtab = .;
30
31 _etext = .;
32
33 . = ALIGN(8192);
34 .data.init_task : { *(.data.init_task) }
35
36 /* Startup code */
37 . = ALIGN(4096);
38 __init_begin = .;
39 .text.init : { *(.text.init) }
40 .data.init : { *(.data.init) }
41 . = ALIGN(16);
42 __setup_start = .;
43 .setup.init : { *(.setup.init) }
44 __setup_end = .;
45 __initcall_start = .;
46 .initcall.init : { *(.initcall.init) }
47 __initcall_end = .;
48 . = ALIGN(4096); /* Align double page for init_task_union */
49 __init_end = .;
50
51 . = ALIGN(4096);
52 .data.page_aligned : { *(.data.idt) }
53
54 . = ALIGN(32);
55 .data.cacheline_aligned : { *(.data.cacheline_aligned) }
56
57 .fini : { *(.fini) } =0
58 .reginfo : { *(.reginfo) }
59 /* Adjust the address for the data segment. We want to adjust up to
60 the same address within the page on the next page up. It would
61 be more correct to do this:
62 . = .;
63 The current expression does not correctly handle the case of a
64 text segment ending precisely at the end of a page; it causes the
65 data segment to skip a page. The above expression does not have
66 this problem, but it will currently (2/95) cause BFD to allocate
67 a single segment, combining both text and data, for this case.
68 This will prevent the text segment from being shared among
69 multiple executions of the program; I think that is more
70 important than losing a page of the virtual address space (note
71 that no actual memory is lost; the page which is skipped can not
72 be referenced). */
73 . = .;
74 .data :
75 {
76 _fdata = . ;
77 *(.data)
78
79 /* Put the compressed image here, so bss is on the end. */
80 __image_begin = .;
81 *(.image)
82 __image_end = .;
83 /* Align the initial ramdisk image (INITRD) on page boundaries. */
84 . = ALIGN(4096);
85 __ramdisk_begin = .;
86 *(.initrd)
87 __ramdisk_end = .;
88 . = ALIGN(4096);
89
90 CONSTRUCTORS
91 }
92 .data1 : { *(.data1) }
93 _gp = . + 0x8000;
94 .lit8 : { *(.lit8) }
95 .lit4 : { *(.lit4) }
96 .ctors : { *(.ctors) }
97 .dtors : { *(.dtors) }
98 .got : { *(.got.plt) *(.got) }
99 .dynamic : { *(.dynamic) }
100 /* We want the small data sections together, so single-instruction offsets
101 can access them all, and initialized data all before uninitialized, so
102 we can shorten the on-disk segment size. */
103 .sdata : { *(.sdata) }
104 . = ALIGN(4);
105 _edata = .;
106 PROVIDE (edata = .);
107
108 __bss_start = .;
109 _fbss = .;
110 .sbss : { *(.sbss) *(.scommon) }
111 .bss :
112 {
113 *(.dynbss)
114 *(.bss)
115 *(COMMON)
116 . = ALIGN(4);
117 _end = . ;
118 PROVIDE (end = .);
119 }
120
121 /* Sections to be discarded */
122 /DISCARD/ :
123 {
124 *(.text.exit)
125 *(.data.exit)
126 *(.exitcall.exit)
127 }
128
129 /* This is the MIPS specific mdebug section. */
130 .mdebug : { *(.mdebug) }
131 /* These are needed for ELF backends which have not yet been
132 converted to the new style linker. */
133 .stab 0 : { *(.stab) }
134 .stabstr 0 : { *(.stabstr) }
135 /* DWARF debug sections.
136 Symbols in the .debug DWARF section are relative to the beginning of the
137 section so we begin .debug at 0. It's not clear yet what needs to happen
138 for the others. */
139 .debug 0 : { *(.debug) }
140 .debug_srcinfo 0 : { *(.debug_srcinfo) }
141 .debug_aranges 0 : { *(.debug_aranges) }
142 .debug_pubnames 0 : { *(.debug_pubnames) }
143 .debug_sfnames 0 : { *(.debug_sfnames) }
144 .line 0 : { *(.line) }
145 /* These must appear regardless of . */
146 .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
147 .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
148 .comment : { *(.comment) }
149 .note : { *(.note) }
150}
diff --git a/arch/mips/boot/compressed/uart-16550.c b/arch/mips/boot/compressed/uart-16550.c
new file mode 100644
index 000000000000..c9caaf4fbf60
--- /dev/null
+++ b/arch/mips/boot/compressed/uart-16550.c
@@ -0,0 +1,43 @@
1/*
2 * 16550 compatible uart based serial debug support for zboot
3 */
4
5#include <linux/types.h>
6#include <linux/serial_reg.h>
7#include <linux/init.h>
8
9#include <asm/addrspace.h>
10
11#if defined(CONFIG_MACH_LOONGSON) || defined(CONFIG_MIPS_MALTA)
12#define UART_BASE 0x1fd003f8
13#define PORT(offset) (CKSEG1ADDR(UART_BASE) + (offset))
14#endif
15
16#ifdef CONFIG_AR7
17#include <ar7.h>
18#define PORT(offset) (CKSEG1ADDR(AR7_REGS_UART0) + (4 * offset))
19#endif
20
21#ifndef PORT
22#error please define the serial port address for your own machine
23#endif
24
25static inline unsigned int serial_in(int offset)
26{
27 return *((char *)PORT(offset));
28}
29
30static inline void serial_out(int offset, int value)
31{
32 *((char *)PORT(offset)) = value;
33}
34
35void putc(char c)
36{
37 int timeout = 1024;
38
39 while (((serial_in(UART_LSR) & UART_LSR_THRE) == 0) && (timeout-- > 0))
40 ;
41
42 serial_out(UART_TX, c);
43}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-16 12:25:46 -0500