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authorKyösti Mälkki <kyosti.malkki@gmail.com>2019-03-05 16:48:25 +0200
committerMartin Roth <martinroth@google.com>2019-09-09 22:17:27 +0000
commit6fdb223859959c5fe9392c0e5a34d6090cdeebeb (patch)
treec3923aba0fc3d9749188d426e439a89d17d0d6c9 /src/arch/x86
parent03026a2a7d4d4b87848e0074efb835306773d16a (diff)
downloadcoreboot-6fdb223859959c5fe9392c0e5a34d6090cdeebeb.tar.xz
arch/x86: Refactor CAR_GLOBAL quirk for FSP1.0
These platforms return to romstage from FSP only after already having torn CAR down. A copy of the entire CAR region is available and discoverable via HOB. Previously, CBMEM console detected on-the-fly that CAR migration had happened and relocated cbmem_console_p accoringlin with car_sync_var(). However, if the CAR_GLOBAL pointing to another object inside CAR is a relative offset instead, we have a more generic solution that can be used with timestamps code as well. Change-Id: Ica877b47e68d56189e9d998b5630019d4328a419 Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/35140 Reviewed-by: Aaron Durbin <adurbin@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Diffstat (limited to 'src/arch/x86')
-rw-r--r--src/arch/x86/include/arch/early_variables.h19
1 files changed, 13 insertions, 6 deletions
diff --git a/src/arch/x86/include/arch/early_variables.h b/src/arch/x86/include/arch/early_variables.h
index 3910a820da..8111e7e10b 100644
--- a/src/arch/x86/include/arch/early_variables.h
+++ b/src/arch/x86/include/arch/early_variables.h
@@ -33,19 +33,25 @@ asm(".previous");
/* Get the correct pointer for the CAR global variable. */
void *car_get_var_ptr(void *var);
-/* Get and update a CAR_GLOBAL pointing elsewhere in car.global_data*/
-void *car_sync_var_ptr(void *var);
-
/* Return 1 when currently running with globals in Cache-as-RAM, 0 otherwise. */
int car_active(void);
/* Get and set a primitive type global variable. */
#define car_get_var(var) \
(*(typeof(var) *)car_get_var_ptr(&(var)))
-#define car_sync_var(var) \
- (*(typeof(var) *)car_sync_var_ptr(&(var)))
#define car_set_var(var, val) car_get_var(var) = (val)
+/* Get and set a CAR_GLOBAL pointing elsewhere inside CAR. */
+#if !CONFIG(PLATFORM_USES_FSP1_0)
+#define car_get_ptr car_get_var
+#define car_set_ptr car_set_var
+#else
+void *car_get_reloc_ptr(void *var);
+void car_set_reloc_ptr(void *var, void *val);
+#define car_get_ptr(var) car_get_reloc_ptr(&(var))
+#define car_set_ptr(var, val) car_set_reloc_ptr(&(var), (val))
+#endif
+
static inline size_t car_data_size(void)
{
size_t car_size = _car_relocatable_data_size;
@@ -66,8 +72,9 @@ static inline size_t car_object_offset(void *ptr)
#define CAR_GLOBAL
#define car_get_var(var) (var)
-#define car_sync_var(var) (var)
#define car_set_var(var, val) (var) = (val)
+#define car_get_ptr car_get_var
+#define car_set_ptr car_set_var
static inline void *car_get_var_ptr(void *var)
{