On 07/30/2013 05:47 PM, Leif Lindholm wrote:
> efi_lookup_mapped_addr() is a handy utility for other platforms
> than x86. Move it from arch/x86 to drivers/firmware/efi.
>
> This function will be used by future ARM patches.
>
> Signed-off-by: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
> ---
> arch/x86/platform/efi/efi.c | 28 ----------------------------
> drivers/firmware/efi/efi.c | 30 ++++++++++++++++++++++++++++++
> 2 files changed, 30 insertions(+), 28 deletions(-)
>
[...]
> +#if defined(CONFIG_X86)
> +/*
> + * We can't ioremap data in EFI boot services RAM, because we've already mapped
> + * it as RAM. So, look it up in the existing EFI memory map instead. Only
> + * callable after efi_enter_virtual_mode and before efi_free_boot_services.
> + */
> +void __iomem *efi_lookup_mapped_addr(u64 phys_addr)
> +{
> + void *p;
> + if (WARN_ON(!memmap.map))
> + return NULL;
> + for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
> + efi_memory_desc_t *md = p;
> + u64 size = md->num_pages << EFI_PAGE_SHIFT;
> + u64 end = md->phys_addr + size;
> + if (!(md->attribute & EFI_MEMORY_RUNTIME) &&
> + md->type != EFI_BOOT_SERVICES_CODE &&
> + md->type != EFI_BOOT_SERVICES_DATA)
> + continue;
> + if (!md->virt_addr)
> + continue;
> + if (phys_addr >= md->phys_addr && phys_addr < end) {
> + phys_addr += md->virt_addr - md->phys_addr;
> + return (__force void __iomem *)(unsigned long)phys_addr;
> + }
> + }
> + return NULL;
> +}
> +#endif
> +
If we hang a 'struct efi_memory_map' off of 'struct efi', can we get rid
of this #ifdef?
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