From: Simon Glass <sjg@chromium.org>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 03/10] arm: Keep track of the tlb size as well as its location
Date: Thu, 1 Nov 2012 16:42:03 -0700 [thread overview]
Message-ID: <1351813330-23741-3-git-send-email-sjg@chromium.org> (raw)
In-Reply-To: <1351813330-23741-1-git-send-email-sjg@chromium.org>
From: Gabe Black <gabeblack@chromium.org>
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 <gabeblack@google.com>
Signed-off-by: Simon Glass <sjg@chromium.org>
---
arch/arm/include/asm/global_data.h | 1 +
arch/arm/lib/board.c | 5 +++--
2 files changed, 4 insertions(+), 2 deletions(-)
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 92cad9a..6e048aa 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -346,13 +346,14 @@ 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 */
--
1.7.7.3
next prev parent reply other threads:[~2012-11-01 23:42 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-11-01 23:42 [U-Boot] [PATCH 01/10] arm: Compile cache_disable() with -O2 to avoid failure Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 02/10] arm: move flush_dcache_all() to just before disable cache Simon Glass
2012-11-01 23:42 ` Simon Glass [this message]
2012-11-01 23:42 ` [U-Boot] [PATCH 04/10] arm: Move fdt check earlier so that board_early_init_f() can use it Simon Glass
2012-11-03 14:56 ` Wolfgang Denk
2012-11-03 21:53 ` Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 05/10] arm: Add CONFIG_DELAY_ENVIRONMENT to delay environment loading Simon Glass
2012-11-03 12:30 ` Wolfgang Denk
2012-11-07 0:16 ` Simon Glass
2013-01-18 12:06 ` Lucas Stach
2013-01-18 13:29 ` Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 06/10] arm: Add CONFIG_DISPLAY_BOARDINFO_LATE to display board info on LCD Simon Glass
2012-11-03 12:33 ` Wolfgang Denk
2012-11-15 22:37 ` Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 07/10] arm: Add option to display customised memory information Simon Glass
2012-11-03 14:54 ` Wolfgang Denk
2012-11-15 22:45 ` Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 08/10] arm: Make interrupts.o and reset.o in libarm also appear in SPL Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 09/10] arm: Move bootstage record for board_init_f() to after arch_cpu_init() Simon Glass
2012-11-03 14:55 ` Wolfgang Denk
2012-11-07 0:51 ` Simon Glass
2012-11-07 13:18 ` Wolfgang Denk
2012-11-22 14:57 ` Simon Glass
2012-11-01 23:42 ` [U-Boot] [PATCH 10/10] arm: Tabify code for MMC initialization Simon Glass
2012-11-03 8:32 ` [U-Boot] [PATCH 01/10] arm: Compile cache_disable() with -O2 to avoid failure Marek Vasut
2012-11-03 12:29 ` Wolfgang Denk
2012-11-07 0:45 ` Simon Glass
2012-11-07 12:55 ` Wolfgang Denk
2012-11-07 15:42 ` Simon Glass
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