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Merge branch 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm

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Pull ARM fixes from Russell King:
 "These are a number of updates to fix a few problems found in the ARM
  nommu code over the last couple of years, caused mostly by changes on
  the mmu side"

* 'fixes' of git://git.armlinux.org.uk/~rmk/linux-arm:
  ARM: 8573/1: domain: move {set,get}_domain under config guard
  ARM: 8572/1: nommu: change memory reserve for the vectors
  ARM: 8571/1: nommu: fix PMSAv7 setup
This commit is contained in:
Linus Torvalds 2016-05-07 08:27:35 -07:00
commit 9125aeb3e2
3 changed files with 20 additions and 8 deletions
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11
arch/arm/include/asm/domain.h
View File

@ -84,6 +84,7 @@
#ifndef __ASSEMBLY__
#ifdef CONFIG_CPU_CP15_MMU
static inline unsigned int get_domain(void)
{
unsigned int domain;
@ -103,6 +104,16 @@ static inline void set_domain(unsigned val)
: : "r" (val) : "memory");
isb();
}
#else
static inline unsigned int get_domain(void)
{
return 0;
}
static inline void set_domain(unsigned val)
{
}
#endif
#ifdef CONFIG_CPU_USE_DOMAINS
#define modify_domain(dom,type) \

2
arch/arm/kernel/head-nommu.S
View File

@ -236,7 +236,7 @@ ENTRY(__setup_mpu)
mov r0, #CONFIG_VECTORS_BASE @ Cover from VECTORS_BASE
ldr r5,=(MPU_AP_PL1RW_PL0NA | MPU_RGN_NORMAL)
/* Writing N to bits 5:1 (RSR_SZ) --> region size 2^N+1 */
mov r6, #(((PAGE_SHIFT - 1) << MPU_RSR_SZ) | 1 << MPU_RSR_EN)
mov r6, #(((2 * PAGE_SHIFT - 1) << MPU_RSR_SZ) | 1 << MPU_RSR_EN)
setup_region r0, r5, r6, MPU_DATA_SIDE @ VECTORS_BASE, PL0 NA, enabled
beq 3f @ Memory-map not unified

15
arch/arm/mm/nommu.c
View File

@ -87,7 +87,6 @@ static unsigned long irbar_read(void)
/* MPU initialisation functions */
void __init sanity_check_meminfo_mpu(void)
{
int i;
phys_addr_t phys_offset = PHYS_OFFSET;
phys_addr_t aligned_region_size, specified_mem_size, rounded_mem_size;
struct memblock_region *reg;
@ -110,11 +109,13 @@ void __init sanity_check_meminfo_mpu(void)
} else {
/*
* memblock auto merges contiguous blocks, remove
* all blocks afterwards
* all blocks afterwards in one go (we can't remove
* blocks separately while iterating)
*/
pr_notice("Ignoring RAM after %pa, memory at %pa ignored\n",
&mem_start, &reg->base);
memblock_remove(reg->base, reg->size);
&mem_end, &reg->base);
memblock_remove(reg->base, 0 - reg->base);
break;
}
}
@ -144,7 +145,7 @@ void __init sanity_check_meminfo_mpu(void)
pr_warn("Truncating memory from %pa to %pa (MPU region constraints)",
&specified_mem_size, &aligned_region_size);
memblock_remove(mem_start + aligned_region_size,
specified_mem_size - aligned_round_size);
specified_mem_size - aligned_region_size);
mem_end = mem_start + aligned_region_size;
}
@ -261,7 +262,7 @@ void __init mpu_setup(void)
return;
region_err = mpu_setup_region(MPU_RAM_REGION, PHYS_OFFSET,
ilog2(meminfo.bank[0].size),
ilog2(memblock.memory.regions[0].size),
MPU_AP_PL1RW_PL0RW | MPU_RGN_NORMAL);
if (region_err) {
panic("MPU region initialization failure! %d", region_err);
@ -285,7 +286,7 @@ void __init arm_mm_memblock_reserve(void)
* some architectures which the DRAM is the exception vector to trap,
* alloc_page breaks with error, although it is not NULL, but "0."
*/
memblock_reserve(CONFIG_VECTORS_BASE, PAGE_SIZE);
memblock_reserve(CONFIG_VECTORS_BASE, 2 * PAGE_SIZE);
#else /* ifndef CONFIG_CPU_V7M */
/*
* There is no dedicated vector page on V7-M. So nothing needs to be