[PATCH 2.6.10-rc1 1/2] [m32r] Update for m32r-g00ff
From: Hirokazu Takata
Date: Thu Nov 11 2004 - 08:17:13 EST
[PATCH 2.6.10-rc1 1/2] [m32r] Update for m32r-g00ff
- Position-independent zImage support;
this aims at removing constraints of zImage(vmlinuz)'s location.
Signed-off-by: NIIBE Yutaka <gniibe@xxxxxxxx>
Signed-off-by: Hirokazu Takata <takata@xxxxxxxxxxxxxx>
---
arch/m32r/boot/compressed/Makefile | 9 +--
arch/m32r/boot/compressed/head.S | 96 ++++++++++++++++++++++++--------
arch/m32r/boot/compressed/m32r_sio.c | 24 +++++---
arch/m32r/boot/compressed/misc.c | 63 ++++++++-------------
arch/m32r/boot/compressed/vmlinux.lds.S | 16 ++++-
arch/m32r/boot/compressed/vmlinux.scr | 6 +-
arch/m32r/boot/setup.S | 2
7 files changed, 136 insertions(+), 80 deletions(-)
diff -ruNp a/arch/m32r/boot/compressed/Makefile b/arch/m32r/boot/compressed/Makefile
--- a/arch/m32r/boot/compressed/Makefile 2004-10-19 06:53:06.000000000 +0900
+++ b/arch/m32r/boot/compressed/Makefile 2004-11-11 16:09:39.000000000 +0900
@@ -5,10 +5,10 @@
#
targets := vmlinux vmlinux.bin vmlinux.bin.gz head.o misc.o \
- m32r-sio.o piggy.o vmlinux.lds
+ piggy.o vmlinux.lds
EXTRA_AFLAGS := -traditional
-OBJECTS = $(obj)/head.o $(obj)/misc.o $(obj)/m32r_sio.o
+OBJECTS = $(obj)/head.o $(obj)/misc.o
#
# IMAGE_OFFSET is the load offset of the compression loader
@@ -28,11 +28,10 @@ $(obj)/vmlinux.bin: vmlinux FORCE
$(obj)/vmlinux.bin.gz: $(obj)/vmlinux.bin FORCE
$(call if_changed,gzip)
-$(obj)/vmlinux.lds: $(obj)/vmlinux.lds.S FORCE
- $(CPP) $(EXTRA_AFLAGS) -C -P -I include $< >$@
-
LDFLAGS_piggy.o := -r --format binary --oformat elf32-m32r-linux -T
OBJCOPYFLAGS += -R .empty_zero_page
+CFLAGS_misc.o += -fpic
+
$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.gz FORCE
$(call if_changed,ld)
diff -ruNp a/arch/m32r/boot/compressed/head.S b/arch/m32r/boot/compressed/head.S
--- a/arch/m32r/boot/compressed/head.S 2004-10-19 06:53:43.000000000 +0900
+++ b/arch/m32r/boot/compressed/head.S 2004-11-10 21:55:52.000000000 +0900
@@ -13,20 +13,62 @@
#include <asm/page.h>
#include <asm/assembler.h>
+ /*
+ * This code can be loaded anywhere, as long as output will not
+ * overlap it.
+ *
+ * NOTE: This head.S should *NOT* be compiled with -fpic.
+ *
+ */
+
.global startup
+ .global __bss_start, _ebss, end, zimage_data, zimage_len
__ALIGN
startup:
ldi r0, #0x0000 /* SPI, disable EI */
mvtc r0, psw
+ ldi r12, #-8
+ bl 1f
+ .fillinsn
+1:
+ seth r1, #high(CONFIG_MEMORY_START + 0x00400000) /* Start address */
+ add r12, r14 /* Real address */
+ sub r12, r1 /* difference */
+
+ .global got_len
+ seth r3, #high(_GLOBAL_OFFSET_TABLE_+8)
+ or3 r3, r3, #low(_GLOBAL_OFFSET_TABLE_+12)
+ add r3, r14
+
+ /* Update the contents of global offset table */
+ ldi r1, #low(got_len)
+ srli r1, #2
+ beqz r1, 2f
+ .fillinsn
+1:
+ ld r2, @r3
+ add r2, r12
+ st r2, @r3
+ addi r3, #4
+ addi r1, #-1
+ bnez r1, 1b
+ .fillinsn
+2:
+ /* XXX: resolve plt */
+
/*
* Clear BSS first so that there are no surprises...
*/
#ifdef CONFIG_ISA_DUAL_ISSUE
+ seth r2, #high(__bss_start)
+ or3 r2, r2, #low(__bss_start)
+ add r2, r12
+ seth r3, #high(_ebss)
+ or3 r3, r3, #low(_ebss)
+ add r3, r12
+ sub r3, r2
- LDIMM (r2, __bss_start)
- LDIMM (r3, _end)
- sub r3, r2 ; BSS size in bytes
; R4 = BSS size in longwords (rounded down)
mv r4, r3 || ldi r1, #0
srli r4, #4 || addi r2, #-4
@@ -52,10 +94,13 @@ startup:
.Lendloop2:
#else /* not CONFIG_ISA_DUAL_ISSUE */
-
- LDIMM (r2, __bss_start)
- LDIMM (r3, _end)
- sub r3, r2 ; BSS size in bytes
+ seth r2, #high(__bss_start)
+ or3 r2, r2, #low(__bss_start)
+ add r2, r12
+ seth r3, #high(_ebss)
+ or3 r3, r3, #low(_ebss)
+ add r3, r12
+ sub r3, r2
mv r4, r3
srli r4, #2 ; R4 = BSS size in longwords (rounded down)
ldi r1, #0 ; clear R1 for longwords store
@@ -66,27 +111,29 @@ startup:
addi r4, #-1 ; decrement count
bnez r4, .Lloop1 ; go do some more
.Lendloop1:
- and3 r4, r3, #3 ; get no. of remaining BSS bytes to clear
- addi r2, #4 ; account for pre-inc store
- beqz r4, .Lendloop2 ; any more to go?
-.Lloop2:
- stb r1, @r2 ; yep, zero out another byte
- addi r2, #1 ; bump address
- addi r4, #-1 ; decrement count
- bnez r4, .Lloop2 ; go do some more
-.Lendloop2:
#endif /* not CONFIG_ISA_DUAL_ISSUE */
- seth r0, #shigh(stack_start)
- ld sp, @(r0, low(stack_start)) /* set stack point */
+ seth r1, #high(end)
+ or3 r1, r1, #low(end)
+ add r1, r12
+ mv sp, r1
/*
* decompress the kernel
*/
+ mv r0, sp
+ srli r0, 31 /* MMU is ON or OFF */
+ seth r1, #high(zimage_data)
+ or3 r1, r1, #low(zimage_data)
+ add r1, r12
+ seth r2, #high(zimage_len)
+ or3 r2, r2, #low(zimage_len)
+ mv r3, sp
+
bl decompress_kernel
-#if defined(CONFIG_CHIP_M32700)
+#if defined(CONFIG_CHIP_M32700) || defined(CONFIG_CHIP_OPSP) || defined(CONFIG_CHIP_VDEC2)
/* Cache flush */
ldi r0, -1
ldi r1, 0xd0 ; invalidate i-cache, copy back d-cache
@@ -94,9 +141,14 @@ startup:
#else
#error "put your cache flush function, please"
#endif
- seth r0, #high(CONFIG_MEMORY_START)
- or3 r0, r0, #0x2000
- jmp r0
+
+ mv r0, sp
+ srli r0, 31 /* MMU is ON or OFF */
+ slli r0, 31
+ or3 r0, r0, #0x2000
+ seth r1, #high(CONFIG_MEMORY_START)
+ or r0, r1
+ jmp r0
.balign 512
fake_headers_as_bzImage:
diff -ruNp a/arch/m32r/boot/compressed/m32r_sio.c b/arch/m32r/boot/compressed/m32r_sio.c
--- a/arch/m32r/boot/compressed/m32r_sio.c 2004-10-19 06:54:31.000000000 +0900
+++ b/arch/m32r/boot/compressed/m32r_sio.c 2004-11-10 21:55:52.000000000 +0900
@@ -6,12 +6,10 @@
*/
#include <linux/config.h>
-#include <asm/m32r.h>
-#include <asm/io.h>
-void putc(char c);
+static void putc(char c);
-int puts(const char *s)
+static int puts(const char *s)
{
char c;
while ((c = *s++)) putc(c);
@@ -19,6 +17,9 @@ int puts(const char *s)
}
#if defined(CONFIG_PLAT_M32700UT_Alpha) || defined(CONFIG_PLAT_M32700UT)
+#include <asm/m32r.h>
+#include <asm/io.h>
+
#define USE_FPGA_MAP 0
#if USE_FPGA_MAP
@@ -35,7 +36,7 @@ int puts(const char *s)
#define BOOT_SIO0TXB PLD_ESIO0TXB
#endif
-void putc(char c)
+static void putc(char c)
{
while ((*BOOT_SIO0STS & 0x3) != 0x3) ;
@@ -46,8 +47,17 @@ void putc(char c)
*BOOT_SIO0TXB = c;
}
#else
-void putc(char c)
+#define SIO0STS (volatile unsigned short *)(0xa0efd000 + 14)
+#define SIO0TXB (volatile unsigned short *)(0xa0efd000 + 30)
+
+static void putc(char c)
{
- /* do nothing */
+
+ while ((*SIO0STS & 0x1) == 0) ;
+ if (c == '\n') {
+ *SIO0TXB = '\r';
+ while ((*SIO0STS & 0x1) == 0) ;
+ }
+ *SIO0TXB = c;
}
#endif
diff -ruNp a/arch/m32r/boot/compressed/misc.c b/arch/m32r/boot/compressed/misc.c
--- a/arch/m32r/boot/compressed/misc.c 2004-10-19 06:53:22.000000000 +0900
+++ b/arch/m32r/boot/compressed/misc.c 2004-11-10 21:55:52.000000000 +0900
@@ -8,8 +8,6 @@
*
* Adapted for SH by Stuart Menefy, Aug 1999
*
- * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
- *
* 2003-02-12: Support M32R by Takeo Takahashi
* This is based on arch/sh/boot/compressed/misc.c.
*/
@@ -38,9 +36,9 @@ typedef unsigned long ulg;
static uch *inbuf; /* input buffer */
static uch window[WSIZE]; /* Sliding window buffer */
-static unsigned insize; /* valid bytes in inbuf */
-static unsigned inptr; /* index of next byte to be processed in inbuf */
-static unsigned outcnt; /* bytes in output buffer */
+static unsigned insize = 0; /* valid bytes in inbuf */
+static unsigned inptr = 0; /* index of next byte to be processed in inbuf */
+static unsigned outcnt = 0; /* bytes in output buffer */
/* gzip flag byte */
#define ASCII_FLAG 0x01 /* bit 0 set: file probably ASCII text */
@@ -76,27 +74,21 @@ static void error(char *m);
static void gzip_mark(void **);
static void gzip_release(void **);
-extern char input_data[];
-extern int input_len;
+static unsigned char *input_data;
+static int input_len;
-static long bytes_out;
+static long bytes_out = 0;
static uch *output_data;
-static unsigned long output_ptr;
+static unsigned long output_ptr = 0;
+#include "m32r_sio.c"
static void *malloc(int size);
static void free(void *where);
-static void error(char *m);
-static void gzip_mark(void **);
-static void gzip_release(void **);
-
-extern int puts(const char *);
-
-extern int _text; /* Defined in vmlinux.lds.S */
-extern int _end;
+
static unsigned long free_mem_ptr;
static unsigned long free_mem_end_ptr;
-
+
#define HEAP_SIZE 0x10000
#include "../../../../lib/inflate.c"
@@ -105,8 +97,8 @@ static void *malloc(int size)
{
void *p;
- if (size <0) error("Malloc error\n");
- if (free_mem_ptr == 0) error("Memory error\n");
+ if (size <0) error("Malloc error");
+ if (free_mem_ptr == 0) error("Memory error");
free_mem_ptr = (free_mem_ptr + 3) & ~3; /* Align */
@@ -114,7 +106,7 @@ static void *malloc(int size)
free_mem_ptr += size;
if (free_mem_ptr >= free_mem_end_ptr)
- error("\nOut of memory\n");
+ error("Out of memory");
return p;
}
@@ -159,7 +151,7 @@ void* memcpy(void* __dest, __const void*
static int fill_inbuf(void)
{
if (insize != 0) {
- error("ran out of input data\n");
+ error("ran out of input data");
}
inbuf = input_data;
@@ -177,9 +169,9 @@ static void flush_window(void)
ulg c = crc; /* temporary variable */
unsigned n;
uch *in, *out, ch;
-
+
in = window;
- out = &output_data[output_ptr];
+ out = &output_data[output_ptr];
for (n = 0; n < outcnt; n++) {
ch = *out++ = *in++;
c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
@@ -199,25 +191,20 @@ static void error(char *x)
while(1); /* Halt */
}
-#define STACK_SIZE (4096)
-long user_stack [STACK_SIZE];
-long* stack_start = &user_stack[STACK_SIZE];
-
/* return decompressed size */
-long decompress_kernel(void)
-{
- insize = 0;
- inptr = 0;
- bytes_out = 0;
- outcnt = 0;
- output_data = 0;
- output_ptr = CONFIG_MEMORY_START + 0x2000;
- free_mem_ptr = (unsigned long)&_end;
+void
+decompress_kernel(int mmu_on, unsigned char *zimage_data,
+ unsigned int zimage_len, unsigned long heap)
+{
+ output_data = (unsigned char *)CONFIG_MEMORY_START + 0x2000
+ + (mmu_on ? 0x80000000 : 0);
+ free_mem_ptr = heap;
free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+ input_data = zimage_data;
+ input_len = zimage_len;
makecrc();
puts("Uncompressing Linux... ");
gunzip();
puts("Ok, booting the kernel.\n");
- return bytes_out;
}
diff -ruNp a/arch/m32r/boot/compressed/vmlinux.lds.S b/arch/m32r/boot/compressed/vmlinux.lds.S
--- a/arch/m32r/boot/compressed/vmlinux.lds.S 2004-10-19 06:54:37.000000000 +0900
+++ b/arch/m32r/boot/compressed/vmlinux.lds.S 2004-11-10 21:55:52.000000000 +0900
@@ -8,16 +8,24 @@ SECTIONS
_text = .;
.text : { *(.text) } = 0
- .rodata : { *(.rodata) }
+ .rodata : { *(.rodata) *(.rodata.*) }
_etext = .;
- . = ALIGN(32) + (. & (32 - 1));
+ . = ALIGN(32 / 8);
.data : { *(.data) }
+ . = ALIGN(32 / 8);
+ _got = .;
+ .got : { *(.got) _egot = .; *(.got.*) }
_edata = .;
. = ALIGN(32 / 8);
__bss_start = .;
- .bss : { *(.bss) }
+ .bss : { *(.bss) *(.sbss) }
. = ALIGN(32 / 8);
- _end = . ;
+ _ebss = .;
+ . = ALIGN(4096);
+ . += 4096;
+ end = . ;
+
+ got_len = (_egot - _got);
}
diff -ruNp a/arch/m32r/boot/compressed/vmlinux.scr b/arch/m32r/boot/compressed/vmlinux.scr
--- a/arch/m32r/boot/compressed/vmlinux.scr 2004-10-19 06:53:43.000000000 +0900
+++ b/arch/m32r/boot/compressed/vmlinux.scr 2004-11-10 21:55:52.000000000 +0900
@@ -1,9 +1,9 @@
SECTIONS
{
.data : {
- input_len = .;
- LONG(input_data_end - input_data) input_data = .;
+ zimage_data = .;
*(.data)
- input_data_end = .;
+ zimage_data_end = .;
}
+ zimage_len = zimage_data_end - zimage_data;
}
diff -ruNp a/arch/m32r/boot/setup.S b/arch/m32r/boot/setup.S
--- a/arch/m32r/boot/setup.S 2004-10-19 06:54:08.000000000 +0900
+++ b/arch/m32r/boot/setup.S 2004-11-11 15:35:22.000000000 +0900
@@ -24,7 +24,7 @@
#define CPU_PARAMS boot_cpu_data
#define M32R_MCICAR 0xfffffff0
#define M32R_MCDCAR 0xfffffff4
-#define M32R_MCCR 0xfffffffc
+#define M32R_MCCR 0xfffffffc
#define M32R_BSCR0 0xffffffd2
;BSEL
--
Hirokazu Takata <takata@xxxxxxxxxxxxxx>
Linux/M32R Project: http://www.linux-m32r.org/
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