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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

  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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