From: Robin Holt Date: Wed, 16 Dec 2009 00:47:52 +0000 (-0800) Subject: x86: uv: introduce a means to translate from gpa -> socket_paddr X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=729d69e6995fc4dea8ff70df256a7d4034a3d21d;p=GitHub%2Fmt8127%2Fandroid_kernel_alcatel_ttab.git x86: uv: introduce a means to translate from gpa -> socket_paddr The UV BIOS has been updated to implement some of our interface functionality differently than originally expected. These patches update the kernel to the bios implementation and include a few minor bug fixes which prevent us from doing significant testing on real hardware. This patch: For SGI UV systems, translate from a global physical address back to a socket physical address. This does nothing to ensure the socket physical address is actually addressable by the kernel. That is the responsibility of the user of the function. Signed-off-by: Robin Holt Cc: Jack Steiner Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h index d1414af98559..0cc955f16aec 100644 --- a/arch/x86/include/asm/uv/uv_hub.h +++ b/arch/x86/include/asm/uv/uv_hub.h @@ -232,6 +232,19 @@ static inline unsigned long uv_gpa(void *v) return uv_soc_phys_ram_to_gpa(__pa(v)); } +/* UV global physical address --> socket phys RAM */ +static inline unsigned long uv_gpa_to_soc_phys_ram(unsigned long gpa) +{ + unsigned long paddr = gpa & uv_hub_info->gpa_mask; + unsigned long remap_base = uv_hub_info->lowmem_remap_base; + unsigned long remap_top = uv_hub_info->lowmem_remap_top; + + if (paddr >= remap_base && paddr < remap_base + remap_top) + paddr -= remap_base; + return paddr; +} + + /* gnode -> pnode */ static inline unsigned long uv_gpa_to_gnode(unsigned long gpa) {