diff options
Diffstat (limited to 'src/arch/x86/boot/cbmem.c')
| -rw-r--r-- | src/arch/x86/boot/cbmem.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/arch/x86/boot/cbmem.c b/src/arch/x86/boot/cbmem.c index 6ec005d183..333ca55ccf 100644 --- a/src/arch/x86/boot/cbmem.c +++ b/src/arch/x86/boot/cbmem.c @@ -18,7 +18,28 @@ #include <console/console.h> #include <cbmem.h> +unsigned long __attribute__((weak)) get_top_of_ram(void) +{ + printk(BIOS_WARNING, "WARNING: you need to define get_top_of_ram() for your chipset\n"); + return 0; +} + #if !CONFIG_DYNAMIC_CBMEM +void get_cbmem_table(uint64_t *base, uint64_t *size) +{ + uint64_t top_of_ram = get_top_of_ram(); + + if (top_of_ram >= HIGH_MEMORY_SIZE) { + *base = top_of_ram - HIGH_MEMORY_SIZE; + *size = HIGH_MEMORY_SIZE; + } else { + *base = 0; + *size = 0; + } +} +#endif + +#if !CONFIG_DYNAMIC_CBMEM && !defined(__PRE_RAM__) /* This is for compatibility with old boards only. Any new chipset and board * must implement get_top_of_ram() for both romstage and ramstage to support * features like CAR_MIGRATION and CBMEM_CONSOLE. |