From 6750edbd8d6d1d72365e29e58b05f164bc23755a Mon Sep 17 00:00:00 2001 From: Andre Heider Date: Thu, 11 Aug 2011 21:31:06 +0200 Subject: powerpc/ps3: Add highmem repository read routines Add repository helper routines to read highmem region info. Bootloaders that preallocate highmem regions must place the region info into the repository at these well known nodes. These routines allow second stage kernles to read the region info from those nodes. Signed-off-by: Andre Heider CC: Nathan Whitehorn Signed-off-by: Geoff Levand --- arch/powerpc/platforms/ps3/repository.c | 66 +++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) (limited to 'arch/powerpc/platforms/ps3/repository.c') diff --git a/arch/powerpc/platforms/ps3/repository.c b/arch/powerpc/platforms/ps3/repository.c index c73f3a68d2a7..9b47ba7a5de7 100644 --- a/arch/powerpc/platforms/ps3/repository.c +++ b/arch/powerpc/platforms/ps3/repository.c @@ -778,6 +778,72 @@ int ps3_repository_read_mm_info(u64 *rm_base, u64 *rm_size, u64 *region_total) : ps3_repository_read_region_total(region_total); } +/** + * ps3_repository_read_highmem_region_count - Read the number of highmem regions + * + * Bootloaders must arrange the repository nodes such that regions are indexed + * with a region_index from 0 to region_count-1. + */ + +int ps3_repository_read_highmem_region_count(unsigned int *region_count) +{ + int result; + u64 v1 = 0; + + result = read_node(PS3_LPAR_ID_CURRENT, + make_first_field("highmem", 0), + make_field("region", 0), + make_field("count", 0), + 0, + &v1, NULL); + *region_count = v1; + return result; +} + + +int ps3_repository_read_highmem_base(unsigned int region_index, + u64 *highmem_base) +{ + return read_node(PS3_LPAR_ID_CURRENT, + make_first_field("highmem", 0), + make_field("region", region_index), + make_field("base", 0), + 0, + highmem_base, NULL); +} + +int ps3_repository_read_highmem_size(unsigned int region_index, + u64 *highmem_size) +{ + return read_node(PS3_LPAR_ID_CURRENT, + make_first_field("highmem", 0), + make_field("region", region_index), + make_field("size", 0), + 0, + highmem_size, NULL); +} + +/** + * ps3_repository_read_highmem_info - Read high memory region info + * @region_index: Region index, {0,..,region_count-1}. + * @highmem_base: High memory base address. + * @highmem_size: High memory size. + * + * Bootloaders that preallocate highmem regions must place the + * region info into the repository at these well known nodes. + */ + +int ps3_repository_read_highmem_info(unsigned int region_index, + u64 *highmem_base, u64 *highmem_size) +{ + int result; + + *highmem_base = 0; + result = ps3_repository_read_highmem_base(region_index, highmem_base); + return result ? result + : ps3_repository_read_highmem_size(region_index, highmem_size); +} + /** * ps3_repository_read_num_spu_reserved - Number of physical spus reserved. * @num_spu: Number of physical spus. -- cgit v1.2.2