[new uImage] Move ramdisk loading to a common routine
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>
diff --git a/lib_ppc/bootm.c b/lib_ppc/bootm.c
index 65edcdb..d73d2fd 100644
--- a/lib_ppc/bootm.c
+++ b/lib_ppc/bootm.c
@@ -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 @@
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 @@
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 @@
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 @@
* pointer.
*/
- asm( "mr %0,1": "=r"(sp) : );
+ sp_limit = get_sp();
+ debug ("## Current stack ends at 0x%08lX ", sp_limit);
- debug ("## Current stack ends at 0x%08lX ", sp);
+ sp_limit -= 2048; /* just to be sure */
+ if (sp_limit > CFG_BOOTMAPSZ)
+ sp_limit = CFG_BOOTMAPSZ;
+ sp_limit &= ~0xF;
- sp -= 2048; /* just to be sure */
- if (sp > CFG_BOOTMAPSZ)
- sp = CFG_BOOTMAPSZ;
- sp &= ~0xF;
+ debug ("=> set upper limit to 0x%08lX\n", sp_limit);
- debug ("=> set upper limit to 0x%08lX\n", sp);
-
- 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 @@
#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 @@
}
#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 @@
/* 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)
{
