[new uImage] Cleanup do_botm_linux() boot allocations
This patch moves common pre-boot allocation steps shared between PPC
and M68K to a helper routines:
common:
- get_boot_sp_limit()
- get_boot_cmline()
- get_boot_kbd()
platform:
- set_clocks_in_mhz()
Signed-off-by: Marian Balakowicz <m8@semihalf.com>
diff --git a/common/image.c b/common/image.c
index 56d6b52..39e5f23 100644
--- a/common/image.c
+++ b/common/image.c
@@ -42,9 +42,15 @@
#endif
extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+
+#ifdef CONFIG_CMD_BDI
+extern int do_bdinfo(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+#endif
+
+DECLARE_GLOBAL_DATA_PTR;
#else
#include "mkimage.h"
-#endif
+#endif /* USE_HOSTCC*/
#include <image.h>
@@ -501,17 +507,19 @@
* 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
+ * - 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
- *
+ * otherwise set initrd_start and initrd_end set to zeros
+ * - returns new allc_current, next free address below BOOTMAPSZ
*/
-void ramdisk_high (ulong rd_data, ulong rd_len, bd_t *kbd, ulong sp_limit,
- ulong sp, ulong *initrd_start, ulong *initrd_end)
+ulong ramdisk_high (ulong alloc_current, 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;
+ ulong new_alloc_current = alloc_current;
if ((s = getenv ("initrd_high")) != NULL) {
/* a value of "no" or a similar string will act like 0,
@@ -540,7 +548,8 @@
*initrd_start = rd_data;
*initrd_end = rd_data + rd_len;
} else {
- *initrd_start = (ulong)kbd - rd_len;
+ new_alloc_current = alloc_current - rd_len;
+ *initrd_start = new_alloc_current;
*initrd_start &= ~(4096 - 1); /* align on page */
if (initrd_high) {
@@ -566,8 +575,10 @@
nsp -= rd_len;
nsp &= ~(4096 - 1); /* align on page */
- if (nsp >= sp_limit)
+ if (nsp >= sp_limit) {
*initrd_start = nsp;
+ new_alloc_current = alloc_current;
+ }
}
show_boot_progress (12);
@@ -587,7 +598,96 @@
}
debug (" ramdisk load start = 0x%08lx, ramdisk load end = 0x%08lx\n",
*initrd_start, *initrd_end);
+
+ return new_alloc_current;
+}
+
+/**
+ * get_boot_sp_limit - calculate stack pointer limit
+ * @sp: current stack pointer
+ *
+ * get_boot_sp_limit() takes current stack pointer adrress and calculates
+ * stack pointer limit, below which kernel boot data (cmdline, board info,
+ * etc.) will be allocated.
+ *
+ * returns:
+ * stack pointer limit
+ */
+ulong get_boot_sp_limit(ulong sp)
+{
+ ulong sp_limit = sp;
+
+ sp_limit -= 2048; /* just to be sure */
+
+ /* make sure sp_limit is within kernel mapped space */
+ if (sp_limit > CFG_BOOTMAPSZ)
+ sp_limit = CFG_BOOTMAPSZ;
+ sp_limit &= ~0xF;
+
+ return sp_limit;
+}
+
+/**
+ * get_boot_cmdline - allocate and initialize kernel cmdline
+ * @alloc_current: current boot allocation address (counting down
+ * from sp_limit)
+ * @cmd_start: pointer to a ulong variable, will hold cmdline start
+ * @cmd_end: pointer to a ulong variable, will hold cmdline end
+ *
+ * get_boot_cmdline() allocates space for kernel command line below
+ * provided alloc_current address. If "bootargs" U-boot environemnt
+ * variable is present its contents is copied to allocated kernel
+ * command line.
+ *
+ * returns:
+ * alloc_current after cmdline allocation
+ */
+ulong get_boot_cmdline (ulong alloc_current, ulong *cmd_start, ulong *cmd_end)
+{
+ char *cmdline;
+ char *s;
+
+ cmdline = (char *)((alloc_current - CFG_BARGSIZE) & ~0xF);
+
+ if ((s = getenv("bootargs")) == NULL)
+ s = "";
+
+ strcpy(cmdline, s);
+
+ *cmd_start = (ulong) & cmdline[0];
+ *cmd_end = *cmd_start + strlen(cmdline);
+
+ debug ("## cmdline at 0x%08lx ... 0x%08lx\n", *cmd_start, *cmd_end);
+
+ return (ulong)cmdline;
+}
+
+/**
+ * get_boot_kbd - allocate and initialize kernel copy of board info
+ * @alloc_current: current boot allocation address (counting down
+ * from sp_limit)
+ * @kbd: double pointer to board info data
+ *
+ * get_boot_kbd() - allocates space for kernel copy of board info data.
+ * Space is allocated below provided alloc_current address and kernel
+ * board info is initialized with the current u-boot board info data.
+ *
+ * returns:
+ * alloc_current after kbd allocation
+ */
+ulong get_boot_kbd (ulong alloc_current, bd_t **kbd)
+{
+ *kbd = (bd_t *) (((ulong)alloc_current - sizeof(bd_t)) & ~0xF);
+ **kbd = *(gd->bd);
+
+ debug ("## kernel board info at 0x%08lx\n", (ulong)*kbd);
+
+#if defined(DEBUG) && defined(CONFIG_CMD_BDI)
+ do_bdinfo(NULL, 0, 0, NULL);
+#endif
+
+ return (ulong)*kbd;
}
#endif /* CONFIG_PPC || CONFIG_M68K */
-#endif /* USE_HOSTCC */
+#endif /* USE_HOSTCC */