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authorKyösti Mälkki <kyosti.malkki@gmail.com>2018-12-28 16:54:54 +0200
committerKyösti Mälkki <kyosti.malkki@gmail.com>2019-01-08 15:33:47 +0000
commitc641f7ed9f9083f73ddb69676a74d7e205351baa (patch)
tree7a81b9621e6c667b0c0a5de268cb7ce08e6c972d /src/soc/intel/baytrail
parentee2e936f4059d8aad4161d44915a05271df1aaae (diff)
downloadcoreboot-c641f7ed9f9083f73ddb69676a74d7e205351baa.tar.xz
cpu/intel/car: Prepare for C_ENVIRONMENT_BOOTBLOCK
Pass timestamps and BIST to romstage using the same signature as C_ENVIRONMENT_BOOTBLOCK will. Change-Id: Ic90da6b1b5ac3b56c69b593ba447ed8e05c8a4e2 Signed-off-by: Arthur Heymans <arthur@aheymans.xyz> Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/30492 Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/soc/intel/baytrail')
-rw-r--r--src/soc/intel/baytrail/include/soc/romstage.h3
-rw-r--r--src/soc/intel/baytrail/romstage/cache_as_ram.inc25
-rw-r--r--src/soc/intel/baytrail/romstage/romstage.c15
3 files changed, 25 insertions, 18 deletions
diff --git a/src/soc/intel/baytrail/include/soc/romstage.h b/src/soc/intel/baytrail/include/soc/romstage.h
index ac0f03bfdf..b65c6809a9 100644
--- a/src/soc/intel/baytrail/include/soc/romstage.h
+++ b/src/soc/intel/baytrail/include/soc/romstage.h
@@ -31,8 +31,7 @@ struct romstage_params {
void mainboard_romstage_entry(struct romstage_params *params);
void romstage_common(struct romstage_params *params);
-void *asmlinkage romstage_main(unsigned long bist, uint32_t tsc_lo,
- uint32_t tsc_high);
+
void raminit(struct mrc_params *mp, int prev_sleep_state);
void gfx_init(void);
void tco_disable(void);
diff --git a/src/soc/intel/baytrail/romstage/cache_as_ram.inc b/src/soc/intel/baytrail/romstage/cache_as_ram.inc
index 8602237d28..4326636bfd 100644
--- a/src/soc/intel/baytrail/romstage/cache_as_ram.inc
+++ b/src/soc/intel/baytrail/romstage/cache_as_ram.inc
@@ -176,23 +176,24 @@ addrsize_set_high:
post_code(0x29)
/* Setup the stack. */
- movl $(CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE), %eax
- movl %eax, %esp
+ mov $_car_stack_end, %esp
- /* Push the initial TSC value from boot block. The low 32 bits are
- * in mm1, and the high 32 bits are in mm2. */
+ /* Need to align stack to 16 bytes at call instruction. Account for
+ the pushes below. */
+ andl $0xfffffff0, %esp
+ subl $4, %esp
+
+ /* push TSC and BIST to stack */
+ movd %mm0, %eax
+ pushl %eax /* BIST */
movd %mm2, %eax
- pushl %eax
+ pushl %eax /* tsc[63:32] */
movd %mm1, %eax
- pushl %eax
- /* Restore the BIST result. */
- movd %mm0, %eax
- pushl %eax
+ pushl %eax /* tsc[31:0] */
-before_romstage:
+before_c_entry:
post_code(0x2a)
- /* Call romstage.c main function. */
- call romstage_main
+ call bootblock_c_entry_bist
/* Should never see this postcode */
post_code(POST_DEAD_CODE)
diff --git a/src/soc/intel/baytrail/romstage/romstage.c b/src/soc/intel/baytrail/romstage/romstage.c
index a52d3b1c2d..4b499061e9 100644
--- a/src/soc/intel/baytrail/romstage/romstage.c
+++ b/src/soc/intel/baytrail/romstage/romstage.c
@@ -17,6 +17,7 @@
#include <arch/cpu.h>
#include <arch/io.h>
#include <arch/early_variables.h>
+#include <bootblock_common.h>
#include <console/console.h>
#include <cbmem.h>
#include <cpu/x86/mtrr.h>
@@ -95,8 +96,7 @@ static void spi_init(void)
}
/* Entry from cache-as-ram.inc. */
-void *asmlinkage romstage_main(unsigned long bist, uint32_t tsc_low,
- uint32_t tsc_hi)
+static void romstage_main(uint64_t tsc, uint32_t bist)
{
struct romstage_params rp = {
.bist = bist,
@@ -104,7 +104,7 @@ void *asmlinkage romstage_main(unsigned long bist, uint32_t tsc_low,
};
/* Save initial timestamp from bootblock. */
- timestamp_init((((uint64_t)tsc_hi) << 32) | (uint64_t)tsc_low);
+ timestamp_init(tsc);
/* Save romstage begin */
timestamp_add_now(TS_START_ROMSTAGE);
@@ -131,7 +131,14 @@ void *asmlinkage romstage_main(unsigned long bist, uint32_t tsc_low,
platform_enter_postcar();
/* We don't return here */
- return NULL;
+}
+
+/* This wrapper enables easy transition towards C_ENVIRONMENT_BOOTBLOCK,
+ * keeping changes in cache_as_ram.S easy to manage.
+ */
+asmlinkage void bootblock_c_entry_bist(uint64_t base_timestamp, uint32_t bist)
+{
+ romstage_main(base_timestamp, bist);
}
static struct chipset_power_state power_state CAR_GLOBAL;