From d8aa712c30148ba26fd89a5dc14de95d4c375184 Mon Sep 17 00:00:00 2001 From: Russell King Date: Thu, 28 Nov 2013 21:43:40 +0000 Subject: ARM: fix booting low-vectors machines Commit f6f91b0d9fd9 (ARM: allow kuser helpers to be removed from the vector page) required two pages for the vectors code. Although the code setting up the initial page tables was updated, the code which allocates page tables for new processes wasn't, neither was the code which tears down the mappings. Fix this. Fixes: f6f91b0d9fd9 ("ARM: allow kuser helpers to be removed from the vector page") Signed-off-by: Russell King Cc: --- arch/arm/include/asm/pgtable.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/include/asm') diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index be956dbf6bae..1571d126e9dd 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -61,7 +61,7 @@ extern void __pgd_error(const char *file, int line, pgd_t); * mapping to be mapped at. This is particularly important for * non-high vector CPUs. */ -#define FIRST_USER_ADDRESS PAGE_SIZE +#define FIRST_USER_ADDRESS (PAGE_SIZE * 2) /* * Use TASK_SIZE as the ceiling argument for free_pgtables() and -- cgit v1.2.3 From b713aa0b15015a65ad5421543b80df86de043d62 Mon Sep 17 00:00:00 2001 From: Russell King Date: Tue, 10 Dec 2013 19:21:08 +0000 Subject: ARM: fix asm/memory.h build error Jason Gunthorpe reports a build failure when ARM_PATCH_PHYS_VIRT is not defined: In file included from arch/arm/include/asm/page.h:163:0, from include/linux/mm_types.h:16, from include/linux/sched.h:24, from arch/arm/kernel/asm-offsets.c:13: arch/arm/include/asm/memory.h: In function '__virt_to_phys': arch/arm/include/asm/memory.h:244:40: error: 'PHYS_OFFSET' undeclared (first use in this function) arch/arm/include/asm/memory.h:244:40: note: each undeclared identifier is reported only once for each function it appears in arch/arm/include/asm/memory.h: In function '__phys_to_virt': arch/arm/include/asm/memory.h:249:13: error: 'PHYS_OFFSET' undeclared (first use in this function) Fixes: ca5a45c06cd4 ("ARM: mm: use phys_addr_t appropriately in p2v and v2p conversions") Tested-By: Jason Gunthorpe Signed-off-by: Russell King --- arch/arm/include/asm/memory.h | 31 ++++++++++++++----------------- arch/arm/kernel/head-nommu.S | 4 ++-- arch/arm/kernel/head.S | 2 +- 3 files changed, 17 insertions(+), 20 deletions(-) (limited to 'arch/arm/include/asm') diff --git a/arch/arm/include/asm/memory.h b/arch/arm/include/asm/memory.h index 9ecccc865046..6976b03e5213 100644 --- a/arch/arm/include/asm/memory.h +++ b/arch/arm/include/asm/memory.h @@ -100,23 +100,19 @@ #define TASK_UNMAPPED_BASE UL(0x00000000) #endif -#ifndef PHYS_OFFSET -#define PHYS_OFFSET UL(CONFIG_DRAM_BASE) -#endif - #ifndef END_MEM #define END_MEM (UL(CONFIG_DRAM_BASE) + CONFIG_DRAM_SIZE) #endif #ifndef PAGE_OFFSET -#define PAGE_OFFSET (PHYS_OFFSET) +#define PAGE_OFFSET PLAT_PHYS_OFFSET #endif /* * The module can be at any place in ram in nommu mode. */ #define MODULES_END (END_MEM) -#define MODULES_VADDR (PHYS_OFFSET) +#define MODULES_VADDR PAGE_OFFSET #define XIP_VIRT_ADDR(physaddr) (physaddr) @@ -157,6 +153,16 @@ #endif #define ARCH_PGD_MASK ((1 << ARCH_PGD_SHIFT) - 1) +/* + * PLAT_PHYS_OFFSET is the offset (from zero) of the start of physical + * memory. This is used for XIP and NoMMU kernels, or by kernels which + * have their own mach/memory.h. Assembly code must always use + * PLAT_PHYS_OFFSET and not PHYS_OFFSET. + */ +#ifndef PLAT_PHYS_OFFSET +#define PLAT_PHYS_OFFSET UL(CONFIG_PHYS_OFFSET) +#endif + #ifndef __ASSEMBLY__ /* @@ -239,6 +245,8 @@ static inline unsigned long __phys_to_virt(phys_addr_t x) #else +#define PHYS_OFFSET PLAT_PHYS_OFFSET + static inline phys_addr_t __virt_to_phys(unsigned long x) { return (phys_addr_t)x - PAGE_OFFSET + PHYS_OFFSET; @@ -251,17 +259,6 @@ static inline unsigned long __phys_to_virt(phys_addr_t x) #endif #endif -#endif /* __ASSEMBLY__ */ - -#ifndef PHYS_OFFSET -#ifdef PLAT_PHYS_OFFSET -#define PHYS_OFFSET PLAT_PHYS_OFFSET -#else -#define PHYS_OFFSET UL(CONFIG_PHYS_OFFSET) -#endif -#endif - -#ifndef __ASSEMBLY__ /* * PFNs are used to describe any physical page; this means diff --git a/arch/arm/kernel/head-nommu.S b/arch/arm/kernel/head-nommu.S index 14235ba64a90..716249cc2ee1 100644 --- a/arch/arm/kernel/head-nommu.S +++ b/arch/arm/kernel/head-nommu.S @@ -68,7 +68,7 @@ ENTRY(stext) #ifdef CONFIG_ARM_MPU /* Calculate the size of a region covering just the kernel */ - ldr r5, =PHYS_OFFSET @ Region start: PHYS_OFFSET + ldr r5, =PLAT_PHYS_OFFSET @ Region start: PHYS_OFFSET ldr r6, =(_end) @ Cover whole kernel sub r6, r6, r5 @ Minimum size of region to map clz r6, r6 @ Region size must be 2^N... @@ -213,7 +213,7 @@ ENTRY(__setup_mpu) set_region_nr r0, #MPU_RAM_REGION isb /* Full access from PL0, PL1, shared for CONFIG_SMP, cacheable */ - ldr r0, =PHYS_OFFSET @ RAM starts at PHYS_OFFSET + ldr r0, =PLAT_PHYS_OFFSET @ RAM starts at PHYS_OFFSET ldr r5,=(MPU_AP_PL1RW_PL0RW | MPU_RGN_NORMAL) setup_region r0, r5, r6, MPU_DATA_SIDE @ PHYS_OFFSET, shared, enabled diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 11d59b32fb8d..32f317e5828a 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -110,7 +110,7 @@ ENTRY(stext) sub r4, r3, r4 @ (PHYS_OFFSET - PAGE_OFFSET) add r8, r8, r4 @ PHYS_OFFSET #else - ldr r8, =PHYS_OFFSET @ always constant in this case + ldr r8, =PLAT_PHYS_OFFSET @ always constant in this case #endif /* -- cgit v1.2.3