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[new uImage] Move ramdisk loading to a common routine

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Ramdisk loading code, including initrd_high variable handling,
was duplicated for PPC and M68K platforms. This patch creates
common helper routine that is being called from both platform
do_bootm_linux() routines.

Signed-off-by: Marian Balakowicz <m8@semihalf.com>
master
Marian Balakowicz 17 years ago committed by Wolfgang Denk
parent 68d4f05e6b
commit ceaed2b1e5
4 changed files with 171 additions and 175 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 113
      common/image.c
  2. 7
      include/image.h
  3. 114
      lib_m68k/bootm.c
  4. 112
      lib_ppc/bootm.c

113
common/image.c
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@ -22,6 +22,9 @@
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*/
#define DEBUG
#ifndef USE_HOSTCC
#include <common.h>
#include <watchdog.h>
@ -34,6 +37,10 @@
#include <dataflash.h>
#endif
#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#else
#include "mkimage.h"
@ -476,5 +483,111 @@ void get_ramdisk (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
debug (" ramdisk start = 0x%08lx, ramdisk end = 0x%08lx\n",
*rd_start, *rd_end);
}
#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
/**
* ramdisk_high - relocate init ramdisk
* @rd_data: ramdisk data start address
* @rd_len: ramdisk data length
* @kbd: kernel board info copy (within BOOTMAPSZ boundary)
* @sp_limit: stack pointer limit (including BOOTMAPSZ)
* @sp: current stack pointer
* @initrd_start: pointer to a ulong variable, will hold final init ramdisk
* start address (after possible relocation)
* @initrd_end: pointer to a ulong variable, will hold final init ramdisk
* end address (after possible relocation)
*
* ramdisk_high() takes a relocation hint from "initrd_high" environement
* variable and if requested ramdisk data is moved to a specified location.
*
* returns:
* initrd_start and initrd_end are set to final (after relocation) ramdisk
* start/end addresses if ramdisk image start and len were provided
* otherwise set initrd_start and initrd_end to zeros
*
*/
void ramdisk_high (ulong rd_data, ulong rd_len, bd_t *kbd, ulong sp_limit,
ulong sp, ulong *initrd_start, ulong *initrd_end)
{
char *s;
ulong initrd_high;
int initrd_copy_to_ram = 1;
if ((s = getenv ("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
* turning the "load high" feature off. This is intentional.
*/
initrd_high = simple_strtoul (s, NULL, 16);
if (initrd_high == ~0)
initrd_copy_to_ram = 0;
} else {
/* not set, no restrictions to load high */
initrd_high = ~0;
}
#ifdef CONFIG_LOGBUFFER
/* Prevent initrd from overwriting logbuffer */
if (initrd_high < (kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD))
initrd_high = kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD;
debug ("## Logbuffer at 0x%08lx ", kbd->bi_memsize - LOGBUFF_LEN);
#endif
debug ("## initrd_high = 0x%08lx, copy_to_ram = %d\n",
initrd_high, initrd_copy_to_ram);
if (rd_data) {
if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
debug (" in-place initrd\n");
*initrd_start = rd_data;
*initrd_end = rd_data + rd_len;
} else {
*initrd_start = (ulong)kbd - rd_len;
*initrd_start &= ~(4096 - 1); /* align on page */
if (initrd_high) {
ulong nsp;
/*
* the inital ramdisk does not need to be within
* CFG_BOOTMAPSZ as it is not accessed until after
* the mm system is initialised.
*
* do the stack bottom calculation again and see if
* the initrd will fit just below the monitor stack
* bottom without overwriting the area allocated
* for command line args and board info.
*/
nsp = sp;
nsp -= 2048; /* just to be sure */
nsp &= ~0xF;
if (nsp > initrd_high) /* limit as specified */
nsp = initrd_high;
nsp -= rd_len;
nsp &= ~(4096 - 1); /* align on page */
if (nsp >= sp_limit)
*initrd_start = nsp;
}
show_boot_progress (12);
*initrd_end = *initrd_start + rd_len;
printf (" Loading Ramdisk to %08lx, end %08lx ... ",
*initrd_start, *initrd_end);
memmove_wd((void *)*initrd_start,
(void *)rd_data, rd_len, CHUNKSZ);
puts ("OK\n");
}
} else {
*initrd_start = 0;
*initrd_end = 0;
}
debug (" ramdisk load start = 0x%08lx, ramdisk load end = 0x%08lx\n",
*initrd_start, *initrd_end);
}
#endif /* CONFIG_PPC || CONFIG_M68K */
#endif /* USE_HOSTCC */

7
include/image.h
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@ -37,6 +37,7 @@
#include <command.h>
#ifndef USE_HOSTCC
#include <linux/string.h>
#include <asm/u-boot.h>
#endif
/*
@ -340,7 +341,11 @@ image_header_t* image_get_ramdisk (cmd_tbl_t *cmdtp, int flag,
void get_ramdisk (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[],
image_header_t *hdr, int verify, uint8_t arch,
ulong *rd_start, ulong *rd_end);
#endif /* USE_HOSTCCa */
#if defined(CONFIG_PPC) || defined(CONFIG_M68K)
void ramdisk_high (ulong rd_data_start, ulong rd_len, bd_t *kbd, ulong sp_limit,
ulong sp, ulong *initrd_start, ulong *initrd_end);
#endif /* CONFIG_PPC || CONFIG_M68K */
#endif /* USE_HOSTCC */
#endif /* __IMAGE_H__ */

114
lib_m68k/bootm.c
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@ -44,16 +44,16 @@ DECLARE_GLOBAL_DATA_PTR;
# define SHOW_BOOT_PROGRESS(arg)
#endif
static ulong get_sp (void);
void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
int argc, char *argv[],
image_header_t *hdr, int verify)
{
ulong sp;
ulong sp_limit;
ulong rd_data_start, rd_data_end, rd_len;
ulong initrd_high;
ulong initrd_start, initrd_end;
int initrd_copy_to_ram = 1;
ulong cmd_start, cmd_end;
char *cmdline;
@ -61,25 +61,6 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
bd_t *kbd;
void (*kernel) (bd_t *, ulong, ulong, ulong, ulong);
if ((s = getenv("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
* turning the "load high" feature off. This is intentional.
*/
initrd_high = simple_strtoul(s, NULL, 16);
if (initrd_high == ~0)
initrd_copy_to_ram = 0;
} else { /* not set, no restrictions to load high */
initrd_high = ~0;
}
#ifdef CONFIG_LOGBUFFER
kbd = gd->bd;
/* Prevent initrd from overwriting logbuffer */
if (initrd_high < (kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD))
initrd_high = kbd->bi_memsize - LOGBUFF_LEN - LOGBUFF_OVERHEAD;
debug("## Logbuffer at 0x%08lX ", kbd->bi_memsize - LOGBUFF_LEN);
#endif
/*
* Booting a (Linux) kernel image
*
@ -89,19 +70,18 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
* memory, which means far enough below the current stack
* pointer.
*/
asm("movel %%a7, %%d0\n"
"movel %%d0, %0\n": "=d"(sp): :"%d0");
sp_limit = get_sp();
debug("## Current stack ends at 0x%08lX ", sp);
debug("## Current stack ends at 0x%08lX ", sp_limit);
sp -= 2048; /* just to be sure */
if (sp > CFG_BOOTMAPSZ)
sp = CFG_BOOTMAPSZ;
sp &= ~0xF;
sp_limit -= 2048; /* just to be sure */
if (sp_limit > CFG_BOOTMAPSZ)
sp_limit = CFG_BOOTMAPSZ;
sp_limit &= ~0xF;
debug("=> set upper limit to 0x%08lX\n", sp);
debug("=> set upper limit to 0x%08lX\n", sp_limit);
cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF);
cmdline = (char *)((sp_limit - CFG_BARGSIZE) & ~0xF);
kbd = (bd_t *) (((ulong) cmdline - sizeof(bd_t)) & ~0xF);
if ((s = getenv("bootargs")) == NULL)
@ -126,69 +106,17 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
kbd->bi_busfreq /= 1000000L;
}
/* find kernel */
kernel =
(void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);
/* find ramdisk */
get_ramdisk (cmdtp, flag, argc, argv, hdr, verify,
IH_ARCH_M68K, &rd_data_start, &rd_data_end);
rd_len = rd_data_end - rd_data_start;
if (rd_data_start) {
if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
initrd_start = rd_data_start;
initrd_end = rd_data_end;
} else {
initrd_start = (ulong) kbd - rd_len;
initrd_start &= ~(4096 - 1); /* align on page */
if (initrd_high) {
ulong nsp;
/*
* the inital ramdisk does not need to be within
* CFG_BOOTMAPSZ as it is not accessed until after
* the mm system is initialised.
*
* do the stack bottom calculation again and see if
* the initrd will fit just below the monitor stack
* bottom without overwriting the area allocated
* above for command line args and board info.
*/
asm("movel %%a7, %%d0\n"
"movel %%d0, %0\n": "=d"(nsp): :"%d0");
nsp -= 2048; /* just to be sure */
nsp &= ~0xF;
if (nsp > initrd_high) /* limit as specified */
nsp = initrd_high;
nsp -= rd_len;
nsp &= ~(4096 - 1); /* align on page */
if (nsp >= sp)
initrd_start = nsp;
}
SHOW_BOOT_PROGRESS(12);
debug
("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
rd_data_start, rd_data_end - 1, rd_len, rd_len);
initrd_end = initrd_start + rd_len;
printf(" Loading Ramdisk to %08lx, end %08lx ... ",
initrd_start, initrd_end);
memmove_wd((void *)initrd_start,
(void *)rd_data_start, rd_len, CHUNKSZ);
puts("OK\n");
}
} else {
initrd_start = 0;
initrd_end = 0;
}
rd_len = rd_data_end - rd_data_start;
ramdisk_high (rd_data_start, rd_len, kdb, sp_limit, get_sp (),
&initrd_start, &initrd_end);
debug("## Transferring control to Linux (at address %08lx) ...\n",
(ulong) kernel);
@ -206,3 +134,13 @@ void do_bootm_linux(cmd_tbl_t * cmdtp, int flag,
(*kernel) (kbd, initrd_start, initrd_end, cmd_start, cmd_end);
/* does not return */
}
static ulong get_sp (void)
{
ulong sp;
asm("movel %%a7, %%d0\n"
"movel %%d0, %0\n": "=d"(sp): :"%d0");
return sp;
}

112
lib_ppc/bootm.c
Unescape View File

@ -43,10 +43,6 @@
static void fdt_error (const char *msg);
#endif
#ifdef CONFIG_LOGBUFFER
#include <logbuff.h>
#endif
#ifdef CFG_INIT_RAM_LOCK
#include <asm/cache.h>
#endif
@ -54,9 +50,10 @@ static void fdt_error (const char *msg);
DECLARE_GLOBAL_DATA_PTR;
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
static ulong get_sp (void);
#if defined(CONFIG_CMD_BDI)
extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
extern int do_bdinfo (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
#endif
void __attribute__((noinline))
@ -65,15 +62,13 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
image_header_t *hdr,
int verify)
{
ulong initrd_high;
int initrd_copy_to_ram = 1;
ulong initrd_start, initrd_end;
ulong rd_data_start, rd_data_end, rd_len;
ulong cmd_start, cmd_end;
char *cmdline;
ulong sp;
ulong sp_limit;
char *s;
bd_t *kbd;
void (*kernel)(bd_t *, ulong, ulong, ulong, ulong);
@ -84,25 +79,6 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
ulong of_data = 0;
#endif
if ((s = getenv ("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
* turning the "load high" feature off. This is intentional.
*/
initrd_high = simple_strtoul(s, NULL, 16);
if (initrd_high == ~0)
initrd_copy_to_ram = 0;
} else { /* not set, no restrictions to load high */
initrd_high = ~0;
}
#ifdef CONFIG_LOGBUFFER
kbd=gd->bd;
/* Prevent initrd from overwriting logbuffer */
if (initrd_high < (kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD))
initrd_high = kbd->bi_memsize-LOGBUFF_LEN-LOGBUFF_OVERHEAD;
debug ("## Logbuffer at 0x%08lX ", kbd->bi_memsize-LOGBUFF_LEN);
#endif
/*
* Booting a (Linux) kernel image
*
@ -113,18 +89,17 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
* pointer.
*/
asm( "mr %0,1": "=r"(sp) : );
debug ("## Current stack ends at 0x%08lX ", sp);
sp_limit = get_sp();
debug ("## Current stack ends at 0x%08lX ", sp_limit);
sp -= 2048; /* just to be sure */
if (sp > CFG_BOOTMAPSZ)
sp = CFG_BOOTMAPSZ;
sp &= ~0xF;
sp_limit -= 2048; /* just to be sure */
if (sp_limit > CFG_BOOTMAPSZ)
sp_limit = CFG_BOOTMAPSZ;
sp_limit &= ~0xF;
debug ("=> set upper limit to 0x%08lX\n", sp);
debug ("=> set upper limit to 0x%08lX\n", sp_limit);
cmdline = (char *)((sp - CFG_BARGSIZE) & ~0xF);
cmdline = (char *)((sp_limit - CFG_BARGSIZE) & ~0xF);
kbd = (bd_t *)(((ulong)cmdline - sizeof(bd_t)) & ~0xF);
if ((s = getenv("bootargs")) == NULL)
@ -168,13 +143,20 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
#endif /* CONFIG_MPC5xxx */
}
/* find kernel */
kernel = (void (*)(bd_t *, ulong, ulong, ulong, ulong))image_get_ep (hdr);
/* find ramdisk */
get_ramdisk (cmdtp, flag, argc, argv, hdr, verify,
IH_ARCH_PPC, &rd_data_start, &rd_data_end);
rd_len = rd_data_end - rd_data_start;
ramdisk_high (rd_data_start, rd_len, kbd, sp_limit, get_sp (),
&initrd_start, &initrd_end);
#if defined(CONFIG_OF_LIBFDT)
/* find flattened device tree */
if(argc > 3) {
of_flat_tree = (char *) simple_strtoul(argv[3], NULL, 16);
fdt_hdr = (image_header_t *)of_flat_tree;
@ -265,56 +247,6 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
}
#endif
if (rd_data_start) {
if (!initrd_copy_to_ram) { /* zero-copy ramdisk support */
initrd_start = rd_data_start;
initrd_end = rd_data_end;
} else {
initrd_start = (ulong)kbd - rd_len;
initrd_start &= ~(4096 - 1); /* align on page */
if (initrd_high) {
ulong nsp;
/*
* the inital ramdisk does not need to be within
* CFG_BOOTMAPSZ as it is not accessed until after
* the mm system is initialised.
*
* do the stack bottom calculation again and see if
* the initrd will fit just below the monitor stack
* bottom without overwriting the area allocated
* above for command line args and board info.
*/
asm( "mr %0,1": "=r"(nsp) : );
nsp -= 2048; /* just to be sure */
nsp &= ~0xF;
if (nsp > initrd_high) /* limit as specified */
nsp = initrd_high;
nsp -= rd_len;
nsp &= ~(4096 - 1); /* align on page */
if (nsp >= sp)
initrd_start = nsp;
}
show_boot_progress (12);
debug ("## initrd at 0x%08lX ... 0x%08lX (len=%ld=0x%lX)\n",
rd_data_start, rd_data_end - 1, rd_len, rd_len);
initrd_end = initrd_start + rd_len;
printf (" Loading Ramdisk to %08lx, end %08lx ... ",
initrd_start, initrd_end);
memmove_wd((void *)initrd_start,
(void *)rd_data_start, rd_len, CHUNKSZ);
puts ("OK\n");
}
} else {
initrd_start = 0;
initrd_end = 0;
}
#if defined(CONFIG_OF_LIBFDT)
@ -413,6 +345,14 @@ do_bootm_linux(cmd_tbl_t *cmdtp, int flag,
/* does not return */
}
static ulong get_sp (void)
{
ulong sp;
asm( "mr %0,1": "=r"(sp) : );
return sp;
}
#if defined(CONFIG_OF_LIBFDT)
static void fdt_error (const char *msg)
{

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