From b35415bb17a73370a2052d619ce1d2c49332107f Mon Sep 17 00:00:00 2001 From: Gregory Nutt Date: Fri, 4 Apr 2014 16:05:20 -0600 Subject: SAMA5: Don't use MMU PMD bufferable bit to try to control write-through vs write-back. It does not work that way --- nuttx/arch/arm/src/armv7-a/mmu.h | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) (limited to 'nuttx/arch') diff --git a/nuttx/arch/arm/src/armv7-a/mmu.h b/nuttx/arch/arm/src/armv7-a/mmu.h index 334843286..1112ec8b1 100644 --- a/nuttx/arch/arm/src/armv7-a/mmu.h +++ b/nuttx/arch/arm/src/armv7-a/mmu.h @@ -2,7 +2,7 @@ * arch/arm/src/armv7-a/mmu.h * CP15 MMU register definitions * - * Copyright (C) 2013 Gregory Nutt. All rights reserved. + * Copyright (C) 2013-2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * References: @@ -296,7 +296,7 @@ #define PMD_SECT_PXN (1 << 0) /* Bit 0: Privileged execute-never bit */ /* Bits 0-1: Type of mapping */ #define PMD_SECT_B (1 << 2) /* Bit 2: Bufferable bit */ -#define PMD_SECT_C (1 << 3) /* Bit 3: Cacheable bit*/ +#define PMD_SECT_C (1 << 3) /* Bit 3: Cacheable bit */ #define PMD_SECT_XN (1 << 4) /* Bit 4: Execute-never bit */ #define PMD_SECT_DOM_SHIFT (5) /* Bits 5-8: Domain */ #define PMD_SECT_DOM_MASK (15 << PMD_SECT_DOM_SHIFT) @@ -502,8 +502,7 @@ #define PMD_STRONGLY_ORDERED (0) #define PMD_DEVICE (PMD_SECT_B) -#define PMD_WRITE_THROUGH (PMD_SECT_C) -#define PMD_WRITE_BACK (PMD_SECT_B | PMD_SECT_C) +#define PM_CACHEABLE (PMD_SECT_B | PMD_SECT_C) #define PTE_STRONGLY_ORDER (0) #define PTE_DEVICE (PTE_B) @@ -515,9 +514,9 @@ * REVISIT: Here we expect all threads to be running at PL1 */ -#define MMU_ROMFLAGS (PMD_TYPE_SECT | PMD_SECT_AP_R1 | PMD_WRITE_THROUGH | \ +#define MMU_ROMFLAGS (PMD_TYPE_SECT | PMD_SECT_AP_R1 | PM_CACHEABLE | \ PMD_SECT_DOM(0)) -#define MMU_MEMFLAGS (PMD_TYPE_SECT | PMD_SECT_AP_RW1 | PMD_WRITE_BACK | \ +#define MMU_MEMFLAGS (PMD_TYPE_SECT | PMD_SECT_AP_RW1 | PM_CACHEABLE | \ PMD_SECT_DOM(0)) #define MMU_IOFLAGS (PMD_TYPE_SECT | PMD_SECT_AP_RW1 | PMD_DEVICE | \ PMD_SECT_DOM(0) | PMD_SECT_XN) -- cgit v1.2.3