[U-Boot] [PATCH 03/11] MIPS: bootm: add support for LMB
Daniel Schwierzeck
daniel.schwierzeck at gmail.com
Sun Jun 9 00:42:42 CEST 2013
This is required for init ramdisk relocation and device tree
support.
Signed-off-by: Gabor Juhos <juhosg at openwrt.org>
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck at gmail.com>
---
arch/mips/include/asm/config.h | 2 ++
arch/mips/lib/bootm.c | 21 +++++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/arch/mips/include/asm/config.h b/arch/mips/include/asm/config.h
index 049c44e..36438be 100644
--- a/arch/mips/include/asm/config.h
+++ b/arch/mips/include/asm/config.h
@@ -21,4 +21,6 @@
#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 5540477..1b0b06a 100644
--- a/arch/mips/lib/bootm.c
+++ b/arch/mips/lib/bootm.c
@@ -43,6 +43,27 @@ 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");
--
1.8.1.2
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