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authorDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2013-05-09 17:10:06 +0200
committerDaniel Schwierzeck <daniel.schwierzeck@gmail.com>2013-08-13 11:58:48 +0200
commitf66cc1e34842da7ed23de23a5c5cd7a8f1305326 (patch)
tree4ca13bebb7d33f687a46f980faa9cae8ac267d43 /arch/mips
parentc4b37847d3f8f98335253bd0e7aeee3ba141b237 (diff)
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MIPS: bootm: add support for LMB
This is required for init ramdisk relocation and device tree support. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Diffstat (limited to 'arch/mips')
-rw-r--r--arch/mips/include/asm/config.h2
-rw-r--r--arch/mips/lib/bootm.c21
2 files changed, 23 insertions, 0 deletions
diff --git a/arch/mips/include/asm/config.h b/arch/mips/include/asm/config.h
index cd29734..6eb1cee 100644
--- a/arch/mips/include/asm/config.h
+++ b/arch/mips/include/asm/config.h
@@ -7,4 +7,6 @@
#ifndef _ASM_CONFIG_H_
#define _ASM_CONFIG_H_
+#define CONFIG_LMB
+
#endif
diff --git a/arch/mips/lib/bootm.c b/arch/mips/lib/bootm.c
index 692f7dc..59ed632 100644
--- a/arch/mips/lib/bootm.c
+++ b/arch/mips/lib/bootm.c
@@ -27,6 +27,27 @@ static int linux_env_idx;
static void linux_params_init(ulong start, char *commandline);
static void linux_env_set(char *env_name, char *env_val);
+static ulong arch_get_sp(void)
+{
+ ulong ret;
+
+ __asm__ __volatile__("move %0, $sp" : "=r"(ret) : );
+
+ return ret;
+}
+
+void arch_lmb_reserve(struct lmb *lmb)
+{
+ ulong sp;
+
+ sp = arch_get_sp();
+ debug("## Current stack ends at 0x%08lx\n", sp);
+
+ /* adjust sp by 4K to be safe */
+ sp -= 4096;
+ lmb_reserve(lmb, sp, CONFIG_SYS_SDRAM_BASE + gd->ram_size - sp);
+}
+
static void boot_prep_linux(bootm_headers_t *images)
{
char *commandline = getenv("bootargs");