Changeset c520034 in mainline for kernel/arch/ia32/src/mm
- Timestamp:
- 2011-12-31T18:19:35Z (14 years ago)
- Branches:
- lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export
- Children:
- 295f658, 77c2b02, 96cd5b4
- Parents:
- 852052d (diff), 22f0561 (diff)
Note: this is a merge changeset, the changes displayed below correspond to the merge itself.
Use the(diff)links above to see all the changes relative to each parent. - Location:
- kernel/arch/ia32/src/mm
- Files:
-
- 1 added
- 2 edited
Legend:
- Unmodified
- Added
- Removed
-
kernel/arch/ia32/src/mm/frame.c
r852052d rc520034 46 46 #include <print.h> 47 47 48 #define PHYSMEM_LIMIT32 UINT64_C(0x07c000000)49 #define PHYSMEM_LIMIT64 UINT64_C(0x200000000)50 51 48 size_t hardcoded_unmapped_ktext_size = 0; 52 49 size_t hardcoded_unmapped_kdata_size = 0; 53 50 54 uintptr_t last_frame = 0; 55 56 static void init_e820_memory(pfn_t minconf) 51 static void init_e820_memory(pfn_t minconf, bool low) 57 52 { 58 53 unsigned int i; 59 54 60 55 for (i = 0; i < e820counter; i++) { 61 uint 64_t base =e820table[i].base_address;62 uint64_t size =e820table[i].size;56 uintptr_t base = (uintptr_t) e820table[i].base_address; 57 size_t size = (size_t) e820table[i].size; 63 58 64 #ifdef __32_BITS__ 65 /* 66 * XXX FIXME: 67 * 68 * Ignore zones which start above PHYSMEM_LIMIT32 69 * or clip zones which go beyond PHYSMEM_LIMIT32. 70 * 71 * The PHYSMEM_LIMIT32 (2 GB - 64 MB) is a rather 72 * arbitrary constant which allows to have at 73 * least 64 MB in the kernel address space to 74 * map hardware resources. 75 * 76 * The kernel uses fixed 1:1 identity mapping 77 * of the physical memory with 2:2 GB split. 78 * This is a severe limitation of the current 79 * kernel memory management. 80 * 81 */ 82 83 if (base > PHYSMEM_LIMIT32) 59 if (!frame_adjust_zone_bounds(low, &base, &size)) 84 60 continue; 85 86 if (base + size > PHYSMEM_LIMIT32)87 size = PHYSMEM_LIMIT32 - base;88 #endif89 90 #ifdef __64_BITS__91 /*92 * XXX FIXME:93 *94 * Ignore zones which start above PHYSMEM_LIMIT6495 * or clip zones which go beyond PHYSMEM_LIMIT64.96 *97 * The PHYSMEM_LIMIT64 (8 GB) is the size of the98 * fixed 1:1 identically mapped physical memory99 * accessible during the bootstrap process.100 * This is a severe limitation of the current101 * kernel memory management.102 *103 */104 105 if (base > PHYSMEM_LIMIT64)106 continue;107 108 if (base + size > PHYSMEM_LIMIT64)109 size = PHYSMEM_LIMIT64 - base;110 #endif111 61 112 62 if (e820table[i].type == MEMMAP_MEMORY_AVAILABLE) { … … 116 66 FRAME_SIZE); 117 67 68 size_t count = SIZE2FRAMES(new_size); 118 69 pfn_t pfn = ADDR2PFN(new_base); 119 size_t count = SIZE2FRAMES(new_size);70 pfn_t conf; 120 71 121 pfn_t conf; 122 if ((minconf < pfn) || (minconf >= pfn + count)) 123 conf = pfn; 124 else 125 conf = minconf; 126 127 zone_create(pfn, count, conf, ZONE_AVAILABLE); 128 129 // XXX this has to be removed 130 if (last_frame < ALIGN_UP(new_base + new_size, FRAME_SIZE)) 131 last_frame = ALIGN_UP(new_base + new_size, FRAME_SIZE); 72 if (low) { 73 if ((minconf < pfn) || (minconf >= pfn + count)) 74 conf = pfn; 75 else 76 conf = minconf; 77 zone_create(pfn, count, conf, 78 ZONE_AVAILABLE | ZONE_LOWMEM); 79 } else { 80 conf = zone_external_conf_alloc(count); 81 zone_create(pfn, count, conf, 82 ZONE_AVAILABLE | ZONE_HIGHMEM); 83 } 132 84 } else if ((e820table[i].type == MEMMAP_MEMORY_ACPI) || 133 85 (e820table[i].type == MEMMAP_MEMORY_NVS)) { … … 179 131 180 132 181 void frame_ arch_init(void)133 void frame_low_arch_init(void) 182 134 { 183 135 pfn_t minconf; … … 192 144 #endif 193 145 194 init_e820_memory(minconf );146 init_e820_memory(minconf, true); 195 147 196 148 /* Reserve frame 0 (BIOS data) */ … … 206 158 } 207 159 160 void frame_high_arch_init(void) 161 { 162 if (config.cpu_active == 1) 163 init_e820_memory(0, false); 164 } 165 208 166 /** @} 209 167 */ -
kernel/arch/ia32/src/mm/page.c
r852052d rc520034 49 49 #include <print.h> 50 50 #include <interrupt.h> 51 #include <macros.h> 51 52 52 53 void page_arch_init(void) … … 55 56 int flags; 56 57 57 if (config.cpu_active == 1) { 58 page_mapping_operations = &pt_mapping_operations; 58 if (config.cpu_active > 1) { 59 /* Fast path for non-boot CPUs */ 60 write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); 61 paging_on(); 62 return; 63 } 64 65 page_mapping_operations = &pt_mapping_operations; 59 66 60 /* 61 * PA2KA(identity) mapping for all frames until last_frame. 62 */ 63 page_table_lock(AS_KERNEL, true); 64 for (cur = 0; cur < last_frame; cur += FRAME_SIZE) { 65 flags = PAGE_CACHEABLE | PAGE_WRITE; 66 if ((PA2KA(cur) >= config.base) && (PA2KA(cur) < config.base + config.kernel_size)) 67 flags |= PAGE_GLOBAL; 68 page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); 69 } 70 page_table_unlock(AS_KERNEL, true); 67 /* 68 * PA2KA(identity) mapping for all low-memory frames. 69 */ 70 page_table_lock(AS_KERNEL, true); 71 for (cur = 0; cur < min(config.identity_size, config.physmem_end); 72 cur += FRAME_SIZE) { 73 flags = PAGE_CACHEABLE | PAGE_WRITE; 74 if ((PA2KA(cur) >= config.base) && 75 (PA2KA(cur) < config.base + config.kernel_size)) 76 flags |= PAGE_GLOBAL; 77 page_mapping_insert(AS_KERNEL, PA2KA(cur), cur, flags); 78 } 79 page_table_unlock(AS_KERNEL, true); 71 80 72 exc_register(14, "page_fault", true, (iroutine_t) page_fault); 73 write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); 74 } else 75 write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); 81 exc_register(14, "page_fault", true, (iroutine_t) page_fault); 82 write_cr3((uintptr_t) AS_KERNEL->genarch.page_table); 76 83 77 84 paging_on(); 78 }79 80 81 uintptr_t hw_map(uintptr_t physaddr, size_t size)82 {83 if (last_frame + ALIGN_UP(size, PAGE_SIZE) > KA2PA(KERNEL_ADDRESS_SPACE_END_ARCH))84 panic("Unable to map physical memory %p (%zu bytes).",85 (void *) physaddr, size);86 87 uintptr_t virtaddr = PA2KA(last_frame);88 pfn_t i;89 page_table_lock(AS_KERNEL, true);90 for (i = 0; i < ADDR2PFN(ALIGN_UP(size, PAGE_SIZE)); i++) {91 uintptr_t addr = PFN2ADDR(i);92 page_mapping_insert(AS_KERNEL, virtaddr + addr, physaddr + addr, PAGE_NOT_CACHEABLE | PAGE_WRITE);93 }94 page_table_unlock(AS_KERNEL, true);95 96 last_frame = ALIGN_UP(last_frame + size, FRAME_SIZE);97 98 return virtaddr;99 85 } 100 86
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