diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/Kconfig | 10 | ||||
| -rw-r--r-- | arch/x86/lib/fsp/fsp_support.c | 33 |
2 files changed, 43 insertions, 0 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 49e173c..a0bd344 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -248,6 +248,16 @@ config FSP_USE_UPD are still some FSPs that might not even have UPD. For such FSPs, override this to n in their platform Kconfig files. +config FSP_BROKEN_HOB + bool + depends on HAVE_FSP + help + Indicate some buggy FSPs that does not report memory used by FSP + itself as reserved in the resource descriptor HOB. Select this to + tell U-Boot to do some additional work to ensure U-Boot relocation + do not overwrite the important boot service data which is used by + FSP, otherwise the subsequent call to fsp_notify() will fail. + config ENABLE_MRC_CACHE bool "Enable MRC cache" depends on !EFI && !SYS_COREBOOT diff --git a/arch/x86/lib/fsp/fsp_support.c b/arch/x86/lib/fsp/fsp_support.c index 29fa060..b05dced 100644 --- a/arch/x86/lib/fsp/fsp_support.c +++ b/arch/x86/lib/fsp/fsp_support.c @@ -225,6 +225,10 @@ u32 fsp_get_usable_lowmem_top(const void *hob_list) struct hob_res_desc *res_desc; phys_addr_t phys_start; u32 top; +#ifdef CONFIG_FSP_BROKEN_HOB + struct hob_mem_alloc *res_mem; + phys_addr_t mem_base = 0; +#endif /* Get the HOB list for processing */ hdr = hob_list; @@ -242,9 +246,38 @@ u32 fsp_get_usable_lowmem_top(const void *hob_list) top += (u32)(res_desc->len); } } + +#ifdef CONFIG_FSP_BROKEN_HOB + /* + * Find out the lowest memory base address allocated by FSP + * for the boot service data + */ + if (hdr->type == HOB_TYPE_MEM_ALLOC) { + res_mem = (struct hob_mem_alloc *)hdr; + if (!mem_base) + mem_base = res_mem->mem_base; + if (res_mem->mem_base < mem_base) + mem_base = res_mem->mem_base; + } +#endif + hdr = get_next_hob(hdr); } +#ifdef CONFIG_FSP_BROKEN_HOB + /* + * Check whether the memory top address is below the FSP HOB list. + * If not, use the lowest memory base address allocated by FSP as + * the memory top address. This is to prevent U-Boot relocation + * overwrites the important boot service data which is used by FSP, + * otherwise the subsequent call to fsp_notify() will fail. + */ + if (top > (u32)hob_list) { + debug("Adjust memory top address due to a buggy FSP\n"); + top = (u32)mem_base; + } +#endif + return top; } |