diff options
| -rw-r--r-- | arch/arm/mach-omap2/sram242x.S | 6 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/sram243x.S | 6 | ||||
| -rw-r--r-- | arch/arm/mach-omap2/sram34xx.S | 6 |
3 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/mach-omap2/sram242x.S b/arch/arm/mach-omap2/sram242x.S index 8e7e6fef09ef..055310cc77de 100644 --- a/arch/arm/mach-omap2/sram242x.S +++ b/arch/arm/mach-omap2/sram242x.S @@ -21,6 +21,12 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA + * + * Richard Woodruff notes that any changes to this code must be carefully + * audited and tested to ensure that they don't cause a TLB miss while + * the SDRAM is inaccessible. Such a situation will crash the system + * since it will cause the ARM MMU to attempt to walk the page tables. + * These crashes may be intermittent. */ #include <linux/linkage.h> #include <asm/assembler.h> diff --git a/arch/arm/mach-omap2/sram243x.S b/arch/arm/mach-omap2/sram243x.S index 9ea87f68524f..f9007580aea3 100644 --- a/arch/arm/mach-omap2/sram243x.S +++ b/arch/arm/mach-omap2/sram243x.S @@ -21,6 +21,12 @@ * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA + * + * Richard Woodruff notes that any changes to this code must be carefully + * audited and tested to ensure that they don't cause a TLB miss while + * the SDRAM is inaccessible. Such a situation will crash the system + * since it will cause the ARM MMU to attempt to walk the page tables. + * These crashes may be intermittent. */ #include <linux/linkage.h> #include <asm/assembler.h> diff --git a/arch/arm/mach-omap2/sram34xx.S b/arch/arm/mach-omap2/sram34xx.S index b7aba60f8325..7f893a29d500 100644 --- a/arch/arm/mach-omap2/sram34xx.S +++ b/arch/arm/mach-omap2/sram34xx.S @@ -104,6 +104,12 @@ * touching the SDRAM. Until that time, users who know that their use case * can satisfy the above requirement can enable the CONFIG_OMAP3_SDRC_AC_TIMING * option. + * + * Richard Woodruff notes that any changes to this code must be carefully + * audited and tested to ensure that they don't cause a TLB miss while + * the SDRAM is inaccessible. Such a situation will crash the system + * since it will cause the ARM MMU to attempt to walk the page tables. + * These crashes may be intermittent. */ ENTRY(omap3_sram_configure_core_dpll) stmfd sp!, {r1-r12, lr} @ store regs to stack |