From: Gabe Black Date: Fri, 30 Nov 2012 13:01:15 +0000 (+0000) Subject: arm: Keep track of the tlb size as well as its location X-Git-Tag: v2013.01~9^2~9 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;ds=sidebyside;h=724cdffca179057f4ebdf413ad764ea70b0e8ed2;p=platform%2Fkernel%2Fu-boot.git arm: Keep track of the tlb size as well as its location It may be necessary to know where the TLB area ends as well as where it starts. This allows board code to complete a secure memory erase without destroying the page tables. Signed-off-by: Gabe Black Signed-off-by: Simon Glass --- diff --git a/arch/arm/include/asm/global_data.h b/arch/arm/include/asm/global_data.h index 2b9af93..41a26ed 100644 --- a/arch/arm/include/asm/global_data.h +++ b/arch/arm/include/asm/global_data.h @@ -73,6 +73,7 @@ typedef struct global_data { unsigned long reloc_off; #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) unsigned long tlb_addr; + unsigned long tlb_size; #endif const void *fdt_blob; /* Our device tree, NULL if none */ void **jt; /* jump table */ diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c index 0459d0c..c214bba 100644 --- a/arch/arm/lib/board.c +++ b/arch/arm/lib/board.c @@ -348,13 +348,14 @@ void board_init_f(ulong bootflag) #if !(defined(CONFIG_SYS_ICACHE_OFF) && defined(CONFIG_SYS_DCACHE_OFF)) /* reserve TLB table */ - addr -= (4096 * 4); + gd->tlb_size = 4096 * 4; + addr -= gd->tlb_size; /* round down to next 64 kB limit */ addr &= ~(0x10000 - 1); gd->tlb_addr = addr; - debug("TLB table at: %08lx\n", addr); + debug("TLB table from %08lx to %08lx\n", addr, addr + gd->tlb_size); #endif /* round down to next 4 kB limit */