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-rw-r--r--payloads/libpayload/arch/arm/Config.in8
-rw-r--r--payloads/libpayload/arch/arm/coreboot.c25
-rw-r--r--payloads/libpayload/arch/arm/head.S8
3 files changed, 17 insertions, 24 deletions
diff --git a/payloads/libpayload/arch/arm/Config.in b/payloads/libpayload/arch/arm/Config.in
index b2ee527ab7..b1f2bb4a80 100644
--- a/payloads/libpayload/arch/arm/Config.in
+++ b/payloads/libpayload/arch/arm/Config.in
@@ -33,12 +33,4 @@ config ARCH_SPECIFIC_OPTIONS # dummy
def_bool y
select LITTLE_ENDIAN
-config COREBOOT_INFO_RANGE_BASE
- hex "Base of the range to search for the coreboot tables"
-
-config COREBOOT_INFO_RANGE_SIZE
- hex "Size of the range to search for the coreboot tables"
- default 0x4000000
-
-
endif
diff --git a/payloads/libpayload/arch/arm/coreboot.c b/payloads/libpayload/arch/arm/coreboot.c
index b91db3255c..c7f371e908 100644
--- a/payloads/libpayload/arch/arm/coreboot.c
+++ b/payloads/libpayload/arch/arm/coreboot.c
@@ -32,6 +32,9 @@
#include <libpayload.h>
#include <coreboot_tables.h>
+/* This pointer gets set in head.S and is passed in from coreboot. */
+void *cb_header_ptr;
+
/*
* Some of this is x86 specific, and the rest of it is generic. Right now,
* since we only support x86, we'll avoid trying to make lots of infrastructure
@@ -169,22 +172,16 @@ static void cb_parse_string(unsigned char *ptr, char **info)
*info = (char *)((struct cb_string *)ptr)->string;
}
-static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
+static int cb_parse_header(void *addr, struct sysinfo_t *info)
{
- struct cb_header *header;
+ struct cb_header *header = addr;
unsigned char *ptr = addr;
void *forward;
int i;
- for (i = 0; i < len; i += 16, ptr += 16) {
- header = (struct cb_header *)ptr;
- if (!strncmp((const char *)header->signature, "LBIO", 4))
- break;
- }
-
- /* We walked the entire space and didn't find anything. */
- if (i >= len)
- return -1;
+ /* No signature found. */
+ if (strncmp((const char *)header->signature, "LBIO", 4))
+ return -1;
if (!header->table_bytes)
return 0;
@@ -209,7 +206,7 @@ static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
switch (rec->tag) {
case CB_TAG_FORWARD:
forward = phys_to_virt((void *)(unsigned long)((struct cb_forward *)rec)->forward);
- return cb_parse_header(forward, len, info);
+ return cb_parse_header(forward, info);
continue;
case CB_TAG_MEMORY:
cb_parse_memory(ptr, info);
@@ -304,9 +301,7 @@ static int cb_parse_header(void *addr, int len, struct sysinfo_t *info)
int get_coreboot_info(struct sysinfo_t *info)
{
- int ret = cb_parse_header(
- phys_to_virt(CONFIG_LP_COREBOOT_INFO_RANGE_BASE),
- CONFIG_LP_COREBOOT_INFO_RANGE_SIZE, info);
+ int ret = cb_parse_header(cb_header_ptr, info);
return (ret == 1) ? 0 : -1;
}
diff --git a/payloads/libpayload/arch/arm/head.S b/payloads/libpayload/arch/arm/head.S
index 54fdb5defd..c5c96ea38f 100644
--- a/payloads/libpayload/arch/arm/head.S
+++ b/payloads/libpayload/arch/arm/head.S
@@ -34,12 +34,16 @@
*/
ENTRY(_entry)
+ /* Save off the location of the coreboot tables */
+ ldr r1, 1f
+ str r0, [r1]
+
/* TODO: disable interrupts */
/* TODO: Clear BSS */
/* Setup new stack */
- ldr sp, 1f
+ ldr sp, 2f
/* TODO: Save old stack pointer and link register */
@@ -56,4 +60,6 @@ ENDPROC(_entry)
.align 4
1:
+.word cb_header_ptr
+2:
.word _stack