diff options
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | src/arch/x86/Makefile.inc | 2 | ||||
| -rw-r--r-- | src/arch/x86/c_start.S | 8 | ||||
| -rw-r--r-- | src/arch/x86/cbmem.c | 13 | ||||
| -rw-r--r-- | src/arch/x86/exit_car.S | 8 |
5 files changed, 18 insertions, 14 deletions
diff --git a/src/arch/x86/Kconfig b/src/arch/x86/Kconfig index 502e7747f4..8ce5977fdb 100644 --- a/src/arch/x86/Kconfig +++ b/src/arch/x86/Kconfig @@ -16,6 +16,7 @@ config ARCH_X86 default n select PCI select RELOCATABLE_MODULES + select RAMSTAGE_CBMEM_TOP_ARG # stage selectors for x86 diff --git a/src/arch/x86/Makefile.inc b/src/arch/x86/Makefile.inc index 8d001745db..447fd57a11 100644 --- a/src/arch/x86/Makefile.inc +++ b/src/arch/x86/Makefile.inc @@ -259,7 +259,6 @@ postcar-generic-ccopts += -D__POSTCAR__ postcar-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.c postcar-y += gdt_init.S postcar-y += cbfs_and_run.c -postcar-y += cbmem.c postcar-$(CONFIG_EARLY_EBDA_INIT) += ebda.c postcar-$(CONFIG_IDT_IN_EVERY_STAGE) += exception.c postcar-$(CONFIG_IDT_IN_EVERY_STAGE) += idt.S @@ -299,7 +298,6 @@ ramstage-$(CONFIG_HAVE_ACPI_TABLES) += acpi_pld.c ramstage-$(CONFIG_HAVE_ACPI_RESUME) += acpi_s3.c ramstage-$(CONFIG_ACPI_BERT) += acpi_bert_storage.c ramstage-y += c_start.S -ramstage-y += cbmem.c ramstage-y += cpu.c ramstage-y += ebda.c ramstage-y += exception.c diff --git a/src/arch/x86/c_start.S b/src/arch/x86/c_start.S index 43d78020e1..bd99c21c91 100644 --- a/src/arch/x86/c_start.S +++ b/src/arch/x86/c_start.S @@ -60,6 +60,14 @@ _start: cld +#ifdef __x86_64__ + mov %rdi, _cbmem_top_ptr +#else + /* The return argument is at 0(%esp), the calling argument at 4(%esp) */ + movl 4(%esp), %eax + movl %eax, _cbmem_top_ptr +#endif + /** poison the stack. Code should not count on the * stack being full of zeros. This stack poisoning * recently uncovered a bug in the broadcast SIPI diff --git a/src/arch/x86/cbmem.c b/src/arch/x86/cbmem.c index f7c58a47ce..fc85bc617f 100644 --- a/src/arch/x86/cbmem.c +++ b/src/arch/x86/cbmem.c @@ -18,19 +18,8 @@ void *cbmem_top_chipset(void) { - static void *cbmem_top_backup; - void *top_backup; - - if (ENV_RAMSTAGE && cbmem_top_backup != NULL) - return cbmem_top_backup; - /* Top of CBMEM is at highest usable DRAM address below 4GiB. */ - top_backup = (void *)restore_top_of_low_cacheable(); - - if (ENV_RAMSTAGE) - cbmem_top_backup = top_backup; - - return top_backup; + return (void *)restore_top_of_low_cacheable(); } #endif /* CBMEM_TOP_BACKUP */ diff --git a/src/arch/x86/exit_car.S b/src/arch/x86/exit_car.S index 679e335eb3..8c2878481b 100644 --- a/src/arch/x86/exit_car.S +++ b/src/arch/x86/exit_car.S @@ -31,6 +31,14 @@ _start: /* Migrate GDT to this text segment */ call gdt_init +#ifdef __x86_64__ + mov %rdi, _cbmem_top_ptr +#else + /* The return argument is at 0(%esp), the calling argument at 4(%esp) */ + movl 4(%esp), %eax + movl %eax, _cbmem_top_ptr +#endif + /* chipset_teardown_car() is expected to disable cache-as-ram. */ call chipset_teardown_car |