diff options
| -rw-r--r-- | arch/arm/kernel/head.S | 8 | ||||
| -rw-r--r-- | arch/arm/mm/mmu.c | 34 |
2 files changed, 27 insertions, 15 deletions
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 1ec35f065617..28873cda464f 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -252,18 +252,23 @@ __create_page_tables: */ add r0, r4, #KERNEL_OFFSET >> (SECTION_SHIFT - PMD_ENTRY_ORDER) ldr r6, =(_end - 1) + + /* For XIP, kernel_sec_start/kernel_sec_end are currently in RO memory */ +#ifndef CONFIG_XIP_KERNEL adr_l r5, kernel_sec_start @ _pa(kernel_sec_start) #if defined CONFIG_CPU_ENDIAN_BE8 || defined CONFIG_CPU_ENDIAN_BE32 str r8, [r5, #4] @ Save physical start of kernel (BE) #else str r8, [r5] @ Save physical start of kernel (LE) #endif +#endif orr r3, r8, r7 @ Add the MMU flags add r6, r4, r6, lsr #(SECTION_SHIFT - PMD_ENTRY_ORDER) 1: str r3, [r0], #1 << PMD_ENTRY_ORDER add r3, r3, #1 << SECTION_SHIFT cmp r0, r6 bls 1b +#ifndef CONFIG_XIP_KERNEL eor r3, r3, r7 @ Remove the MMU flags adr_l r5, kernel_sec_end @ _pa(kernel_sec_end) #if defined CONFIG_CPU_ENDIAN_BE8 || defined CONFIG_CPU_ENDIAN_BE32 @@ -271,8 +276,7 @@ __create_page_tables: #else str r3, [r5] @ Save physical end of kernel (LE) #endif - -#ifdef CONFIG_XIP_KERNEL +#else /* * Map the kernel image separately as it is not located in RAM. */ diff --git a/arch/arm/mm/mmu.c b/arch/arm/mm/mmu.c index f85c177cdf8d..f5b7a16c5803 100644 --- a/arch/arm/mm/mmu.c +++ b/arch/arm/mm/mmu.c @@ -1403,18 +1403,6 @@ static void __init devicemaps_init(const struct machine_desc *mdesc) } /* - * Map the kernel if it is XIP. - * It is always first in the modulearea. - */ -#ifdef CONFIG_XIP_KERNEL - map.pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & SECTION_MASK); - map.virtual = MODULES_VADDR; - map.length = ((unsigned long)_exiprom - map.virtual + ~SECTION_MASK) & SECTION_MASK; - map.type = MT_ROM; - create_mapping(&map); -#endif - - /* * Map the cache flushing regions. */ #ifdef FLUSH_BASE @@ -1603,12 +1591,27 @@ static void __init map_kernel(void) * This will only persist until we turn on proper memory management later on * and we remap the whole kernel with page granularity. */ +#ifdef CONFIG_XIP_KERNEL + phys_addr_t kernel_nx_start = kernel_sec_start; +#else phys_addr_t kernel_x_start = kernel_sec_start; phys_addr_t kernel_x_end = round_up(__pa(__init_end), SECTION_SIZE); phys_addr_t kernel_nx_start = kernel_x_end; +#endif phys_addr_t kernel_nx_end = kernel_sec_end; struct map_desc map; + /* + * Map the kernel if it is XIP. + * It is always first in the modulearea. + */ +#ifdef CONFIG_XIP_KERNEL + map.pfn = __phys_to_pfn(CONFIG_XIP_PHYS_ADDR & SECTION_MASK); + map.virtual = MODULES_VADDR; + map.length = ((unsigned long)_exiprom - map.virtual + ~SECTION_MASK) & SECTION_MASK; + map.type = MT_ROM; + create_mapping(&map); +#else map.pfn = __phys_to_pfn(kernel_x_start); map.virtual = __phys_to_virt(kernel_x_start); map.length = kernel_x_end - kernel_x_start; @@ -1618,7 +1621,7 @@ static void __init map_kernel(void) /* If the nx part is small it may end up covered by the tail of the RWX section */ if (kernel_x_end == kernel_nx_end) return; - +#endif map.pfn = __phys_to_pfn(kernel_nx_start); map.virtual = __phys_to_virt(kernel_nx_start); map.length = kernel_nx_end - kernel_nx_start; @@ -1764,6 +1767,11 @@ void __init paging_init(const struct machine_desc *mdesc) { void *zero_page; +#ifdef CONFIG_XIP_KERNEL + /* Store the kernel RW RAM region start/end in these variables */ + kernel_sec_start = CONFIG_PHYS_OFFSET & SECTION_MASK; + kernel_sec_end = round_up(__pa(_end), SECTION_SIZE); +#endif pr_debug("physical kernel sections: 0x%08llx-0x%08llx\n", kernel_sec_start, kernel_sec_end); |