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-rw-r--r--arch/mips/boot/compressed/Makefile105
-rw-r--r--arch/mips/boot/compressed/dbg.c37
-rw-r--r--arch/mips/boot/compressed/decompress.c120
-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.script67
-rw-r--r--arch/mips/boot/compressed/uart-16550.c43
-rw-r--r--arch/mips/boot/compressed/uart-alchemy.c7
8 files changed, 439 insertions, 0 deletions
diff --git a/arch/mips/boot/compressed/Makefile b/arch/mips/boot/compressed/Makefile
new file mode 100644
index 000000000000..790ddd397620
--- /dev/null
+++ b/arch/mips/boot/compressed/Makefile
@@ -0,0 +1,105 @@
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 <wuzhangjin@gmail.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 -n $$(($(VMLINUX_SIZE) + (65536 - $(VMLINUX_SIZE) % 65536))))
18# VMLINUZ_LOAD_ADDRESS = concat "high32 of VMLINUX_LOAD_ADDRESS" and "(low32 of VMLINUX_LOAD_ADDRESS) + VMLINUX_SIZE"
19HIGH32 := $(shell A=$(VMLINUX_LOAD_ADDRESS); [ $${\#A} -gt 10 ] && expr substr "$(VMLINUX_LOAD_ADDRESS)" 3 $$(($${\#A} - 10)))
20LOW32 := $(shell [ -n "$(HIGH32)" ] && A=11 || A=3; expr substr "$(VMLINUX_LOAD_ADDRESS)" $${A} 8)
21VMLINUZ_LOAD_ADDRESS := 0x$(shell [ -n "$(VMLINUX_SIZE)" -a -n "$(LOW32)" ] && printf "$(HIGH32)%08x" $$(($(VMLINUX_SIZE) + 0x$(LOW32))))
22
23# set the default size of the mallocing area for decompressing
24BOOT_HEAP_SIZE := 0x400000
25
26# Disable Function Tracer
27KBUILD_CFLAGS := $(shell echo $(KBUILD_CFLAGS) | sed -e "s/-pg//")
28
29KBUILD_CFLAGS := $(LINUXINCLUDE) $(KBUILD_CFLAGS) -D__KERNEL__ \
30 -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) -D"VMLINUX_LOAD_ADDRESS_ULL=$(VMLINUX_LOAD_ADDRESS)ull"
31
32KBUILD_AFLAGS := $(LINUXINCLUDE) $(KBUILD_AFLAGS) -D__ASSEMBLY__ \
33 -DBOOT_HEAP_SIZE=$(BOOT_HEAP_SIZE) \
34 -DKERNEL_ENTRY=0x$(shell $(NM) $(objtree)/$(KBUILD_IMAGE) 2>/dev/null | grep " kernel_entry" | cut -f1 -d \ )
35
36obj-y := $(obj)/head.o $(obj)/decompress.o $(obj)/dbg.o
37
38ifdef CONFIG_DEBUG_ZBOOT
39obj-$(CONFIG_SYS_SUPPORTS_ZBOOT_UART16550) += $(obj)/uart-16550.o
40obj-$(CONFIG_MACH_ALCHEMY) += $(obj)/uart-alchemy.o
41endif
42
43OBJCOPYFLAGS_vmlinux.bin := $(OBJCOPYFLAGS) -O binary -R .comment -S
44$(obj)/vmlinux.bin: $(KBUILD_IMAGE)
45 $(call if_changed,objcopy)
46
47suffix_$(CONFIG_KERNEL_GZIP) = gz
48suffix_$(CONFIG_KERNEL_BZIP2) = bz2
49suffix_$(CONFIG_KERNEL_LZMA) = lzma
50suffix_$(CONFIG_KERNEL_LZO) = lzo
51tool_$(CONFIG_KERNEL_GZIP) = gzip
52tool_$(CONFIG_KERNEL_BZIP2) = bzip2
53tool_$(CONFIG_KERNEL_LZMA) = lzma
54tool_$(CONFIG_KERNEL_LZO) = lzo
55$(obj)/vmlinux.$(suffix_y): $(obj)/vmlinux.bin
56 $(call if_changed,$(tool_y))
57
58$(obj)/piggy.o: $(obj)/vmlinux.$(suffix_y) $(obj)/dummy.o
59 $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) \
60 --add-section=.image=$< \
61 --set-section-flags=.image=contents,alloc,load,readonly,data \
62 $(obj)/dummy.o $@
63
64LDFLAGS_vmlinuz := $(LDFLAGS) -Ttext $(VMLINUZ_LOAD_ADDRESS) -T
65vmlinuz: $(src)/ld.script $(obj-y) $(obj)/piggy.o
66 $(call if_changed,ld)
67 $(Q)$(OBJCOPY) $(OBJCOPYFLAGS) $@
68
69#
70# Some DECstations need all possible sections of an ECOFF executable
71#
72ifdef CONFIG_MACH_DECSTATION
73 E2EFLAGS = -a
74else
75 E2EFLAGS =
76endif
77
78# elf2ecoff can only handle 32bit image
79
80ifdef CONFIG_32BIT
81 VMLINUZ = vmlinuz
82else
83 VMLINUZ = vmlinuz.32
84endif
85
86vmlinuz.32: vmlinuz
87 $(Q)$(OBJCOPY) -O $(32bit-bfd) $(OBJCOPYFLAGS) $< $@
88
89vmlinuz.ecoff: $(obj)/../elf2ecoff $(VMLINUZ)
90 $(Q)$(obj)/../elf2ecoff $(VMLINUZ) vmlinuz.ecoff $(E2EFLAGS)
91
92$(obj)/../elf2ecoff: $(src)/../elf2ecoff.c
93 $(Q)$(HOSTCC) -o $@ $^
94
95OBJCOPYFLAGS_vmlinuz.bin := $(OBJCOPYFLAGS) -O binary
96vmlinuz.bin: vmlinuz
97 $(call if_changed,objcopy)
98
99OBJCOPYFLAGS_vmlinuz.srec := $(OBJCOPYFLAGS) -S -O srec
100vmlinuz.srec: vmlinuz
101 $(call if_changed,objcopy)
102
103clean:
104clean-files += *.o \
105 vmlinu*
diff --git a/arch/mips/boot/compressed/dbg.c b/arch/mips/boot/compressed/dbg.c
new file mode 100644
index 000000000000..134a6162e394
--- /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#include <linux/compiler.h>
9#include <linux/init.h>
10#include <linux/types.h>
11
12void __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..5db43c58b1bf
--- /dev/null
+++ b/arch/mips/boot/compressed/decompress.c
@@ -0,0 +1,120 @@
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.
9 * Author: Wu Zhangjin <wuzhangjin@gmail.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;
31
32/* debug interfaces */
33extern void puts(const char *s);
34extern void puthex(unsigned long long val);
35
36void error(char *x)
37{
38 puts("\n\n");
39 puts(x);
40 puts("\n\n -- System halted");
41
42 while (1)
43 ; /* Halt */
44}
45
46/* activate the code for pre-boot environment */
47#define STATIC static
48
49#ifdef CONFIG_KERNEL_GZIP
50void *memcpy(void *dest, const void *src, size_t n)
51{
52 int i;
53 const char *s = src;
54 char *d = dest;
55
56 for (i = 0; i < n; i++)
57 d[i] = s[i];
58 return dest;
59}
60#include "../../../../lib/decompress_inflate.c"
61#endif
62
63#ifdef CONFIG_KERNEL_BZIP2
64void *memset(void *s, int c, size_t n)
65{
66 int i;
67 char *ss = s;
68
69 for (i = 0; i < n; i++)
70 ss[i] = c;
71 return s;
72}
73#include "../../../../lib/decompress_bunzip2.c"
74#endif
75
76#ifdef CONFIG_KERNEL_LZMA
77#include "../../../../lib/decompress_unlzma.c"
78#endif
79
80#ifdef CONFIG_KERNEL_LZO
81#include "../../../../lib/decompress_unlzo.c"
82#endif
83
84void decompress_kernel(unsigned long boot_heap_start)
85{
86 int zimage_size;
87
88 /*
89 * We link ourself to an arbitrary low address. When we run, we
90 * relocate outself to that address. __image_beign points to
91 * the part of the image where the zImage is. -- Tom
92 */
93 zimage_start = (char *)(unsigned long)(&__image_begin);
94 zimage_size = (unsigned long)(&__image_end) -
95 (unsigned long)(&__image_begin);
96
97 /*
98 * The zImage and initrd will be between start and _end, so they've
99 * already been moved once. We're good to go now. -- Tom
100 */
101 puts("zimage at: ");
102 puthex((unsigned long)zimage_start);
103 puts(" ");
104 puthex((unsigned long)(zimage_size + zimage_start));
105 puts("\n");
106
107 /* this area are prepared for mallocing when decompressing */
108 free_mem_ptr = boot_heap_start;
109 free_mem_end_ptr = boot_heap_start + BOOT_HEAP_SIZE;
110
111 /* Display standard Linux/MIPS boot prompt for kernel args */
112 puts("Uncompressing Linux at load address ");
113 puthex(VMLINUX_LOAD_ADDRESS_ULL);
114 puts("\n");
115 /* Decompress the kernel with according algorithm */
116 decompress(zimage_start, zimage_size, 0, 0,
117 (void *)VMLINUX_LOAD_ADDRESS_ULL, 0, error);
118 /* FIXME: is there a need to flush cache here? */
119 puts("Now, booting the kernel...\n");
120}
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..613a35b02f50
--- /dev/null
+++ b/arch/mips/boot/compressed/ld.script
@@ -0,0 +1,67 @@
1/*
2 * ld.script for compressed kernel support of MIPS
3 *
4 * Copyright (C) 2009 Lemote Inc.
5 * Author: Wu Zhangjin <wuzj@lemote.com>
6 */
7
8OUTPUT_ARCH(mips)
9ENTRY(start)
10SECTIONS
11{
12 /* . = VMLINUZ_LOAD_ADDRESS */
13 /* read-only */
14 _text = .; /* Text and read-only data */
15 .text : {
16 _ftext = . ;
17 *(.text)
18 *(.rodata)
19 } = 0
20 _etext = .; /* End of text section */
21
22 /* writable */
23 .data : { /* Data */
24 _fdata = . ;
25 *(.data)
26 /* Put the compressed image here, so bss is on the end. */
27 __image_begin = .;
28 *(.image)
29 __image_end = .;
30 CONSTRUCTORS
31 }
32 .sdata : { *(.sdata) }
33 . = ALIGN(4);
34 _edata = .; /* End of data section */
35
36 /* BSS */
37 __bss_start = .;
38 _fbss = .;
39 .sbss : { *(.sbss) *(.scommon) }
40 .bss : {
41 *(.dynbss)
42 *(.bss)
43 *(COMMON)
44 }
45 . = ALIGN(4);
46 _end = . ;
47
48 /* These are needed for ELF backends which have not yet been converted
49 * to the new style linker. */
50
51 .stab 0 : { *(.stab) }
52 .stabstr 0 : { *(.stabstr) }
53
54 /* These must appear regardless of . */
55 .gptab.sdata : { *(.gptab.data) *(.gptab.sdata) }
56 .gptab.sbss : { *(.gptab.bss) *(.gptab.sbss) }
57
58 /* Sections to be discarded */
59 /DISCARD/ : {
60 *(.MIPS.options)
61 *(.options)
62 *(.pdr)
63 *(.reginfo)
64 *(.comment)
65 *(.note)
66 }
67}
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}
diff --git a/arch/mips/boot/compressed/uart-alchemy.c b/arch/mips/boot/compressed/uart-alchemy.c
new file mode 100644
index 000000000000..1bff22fa089b
--- /dev/null
+++ b/arch/mips/boot/compressed/uart-alchemy.c
@@ -0,0 +1,7 @@
1#include <asm/mach-au1x00/au1000.h>
2
3void putc(char c)
4{
5 /* all current (Jan. 2010) in-kernel boards */
6 alchemy_uart_putchar(UART0_PHYS_ADDR, c);
7}
generated by cgit v1.2.2 (git 2.25.0) at 2025-07-13 13:57:41 -0400