146 lines
6.2 KiB
C
146 lines
6.2 KiB
C
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#include "type.h"
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#include "hal/mem.h"
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#include "hal/cpu.h"
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#include "lib/salloc.h"
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#include "hal/intr.h"
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static uint8_t _gdts[HAL_CORE_COUNT][GDT_ENTRY_NUM * GDT_ENTRY_SIZE];
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static hal_gdt_ptr_t _gdt_ptrs[HAL_CORE_COUNT];
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#define KERNEL_HEAP_SIZE 8192
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char kernel_heap[KERNEL_HEAP_SIZE];
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void KABI hal_write_pt_entry(void *const base, uint64_t const p_addr, uint64_t const attr)
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{
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if (base == NULL)
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return;
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uint64_t entry = (p_addr & 0xFFFFFFFFFF000) | attr;
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((uint8_t *) base)[0] = (uint8_t) (entry & 0xFF);
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((uint8_t *) base)[1] = (uint8_t) ((entry >> 8) & 0xFF);
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((uint8_t *) base)[2] = (uint8_t) ((entry >> 16) & 0xFF);
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((uint8_t *) base)[3] = (uint8_t) ((entry >> 24) & 0xFF);
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((uint8_t *) base)[4] = (uint8_t) ((entry >> 32) & 0xFF);
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((uint8_t *) base)[5] = (uint8_t) ((entry >> 40) & 0xFF);
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((uint8_t *) base)[6] = (uint8_t) ((entry >> 48) & 0xFF);
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((uint8_t *) base)[7] = (uint8_t) ((entry >> 56) & 0xFF);
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return;
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}
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void KABI hal_write_pd_entry(void *const base, uint64_t const pt_addr, uint64_t const attr)
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{
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if (base == NULL)
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return;
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uint64_t entry = (pt_addr & 0xFFFFFFFFFF000) | attr;
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((uint8_t *) base)[0] = (uint8_t) (entry & 0xFF);
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((uint8_t *) base)[1] = (uint8_t) ((entry >> 8) & 0xFF);
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((uint8_t *) base)[2] = (uint8_t) ((entry >> 16) & 0xFF);
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((uint8_t *) base)[3] = (uint8_t) ((entry >> 24) & 0xFF);
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((uint8_t *) base)[4] = (uint8_t) ((entry >> 32) & 0xFF);
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((uint8_t *) base)[5] = (uint8_t) ((entry >> 40) & 0xFF);
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((uint8_t *) base)[6] = (uint8_t) ((entry >> 48) & 0xFF);
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((uint8_t *) base)[7] = (uint8_t) ((entry >> 56) & 0xFF);
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return;
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}
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void KABI hal_write_pdpt_entry(void *const base, uint64_t const pd_addr, uint64_t const attr)
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{
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if (base == NULL)
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return;
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uint64_t entry = (pd_addr & 0xFFFFFFFFFF000) | attr;
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((uint8_t *) base)[0] = (uint8_t) (entry & 0xFF);
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((uint8_t *) base)[1] = (uint8_t) ((entry >> 8) & 0xFF);
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((uint8_t *) base)[2] = (uint8_t) ((entry >> 16) & 0xFF);
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((uint8_t *) base)[3] = (uint8_t) ((entry >> 24) & 0xFF);
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((uint8_t *) base)[4] = (uint8_t) ((entry >> 32) & 0xFF);
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((uint8_t *) base)[5] = (uint8_t) ((entry >> 40) & 0xFF);
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((uint8_t *) base)[6] = (uint8_t) ((entry >> 48) & 0xFF);
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((uint8_t *) base)[7] = (uint8_t) ((entry >> 56) & 0xFF);
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return;
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}
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void KABI hal_write_pml4_entry(void *const base, uint64_t const pdpt_addr, uint64_t const attr)
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{
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if (base == NULL)
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return;
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uint64_t const entry = (pdpt_addr & 0xFFFFFFFFFF000) | attr;
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((uint8_t *) base)[0] = (uint8_t) (entry & 0xFF);
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((uint8_t *) base)[1] = (uint8_t) ((entry >> 8) & 0xFF);
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((uint8_t *) base)[2] = (uint8_t) ((entry >> 16) & 0xFF);
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((uint8_t *) base)[3] = (uint8_t) ((entry >> 24) & 0xFF);
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((uint8_t *) base)[4] = (uint8_t) ((entry >> 32) & 0xFF);
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((uint8_t *) base)[5] = (uint8_t) ((entry >> 40) & 0xFF);
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((uint8_t *) base)[6] = (uint8_t) ((entry >> 48) & 0xFF);
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((uint8_t *) base)[7] = (uint8_t) ((entry >> 56) & 0xFF);
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return;
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}
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void KABI hal_write_segment_descriptor(void *const gdt, uint32_t const base, uint32_t const limit,
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uint64_t const attr)
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{
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if (gdt == NULL)
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return;
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uint64_t const seg_desc = (((uint64_t) base & 0xFFFF) << 16) | ((((uint64_t) base >> 16) & 0xFF) << 32) |
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((((uint64_t) base >> 24) & 0xFF) << 56) | ((uint64_t) limit & 0xFFFF) |
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((((uint64_t) limit >> 16) & 0xF) << 48) | attr;
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((uint8_t *) gdt)[0] = (uint8_t) (seg_desc & 0xFF);
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((uint8_t *) gdt)[1] = (uint8_t) ((seg_desc >> 8) & 0xFF);
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((uint8_t *) gdt)[2] = (uint8_t) ((seg_desc >> 16) & 0xFF);
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((uint8_t *) gdt)[3] = (uint8_t) ((seg_desc >> 24) & 0xFF);
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((uint8_t *) gdt)[4] = (uint8_t) ((seg_desc >> 32) & 0xFF);
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((uint8_t *) gdt)[5] = (uint8_t) ((seg_desc >> 40) & 0xFF);
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((uint8_t *) gdt)[6] = (uint8_t) ((seg_desc >> 48) & 0xFF);
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((uint8_t *) gdt)[7] = (uint8_t) ((seg_desc >> 56) & 0xFF);
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return;
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}
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void *KABI halloc(uint32_t size)
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{
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return lb_salloc(kernel_heap, size);
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}
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void KABI hfree(void *ptr)
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{
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lb_sfree(kernel_heap, ptr);
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return;
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}
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static void KABI _hal_init_gdt(void)
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{
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uint32_t coreid = hal_get_core_id();
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// get gdt ready
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hal_write_segment_descriptor((void *) &_gdts[coreid][0], 0, 0, 0);
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hal_write_segment_descriptor((void *) &_gdts[coreid][8], 0, 0,
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SEG_DPL_0 | SEG_CODE_DATA | SEG_PRESENT | SEG_LONG | SEG_TYPE_CODE_X);
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hal_write_segment_descriptor((void *) &_gdts[coreid][16], 0, 0,
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SEG_DPL_0 | SEG_CODE_DATA | SEG_PRESENT | SEG_LONG | SEG_TYPE_DATA_RW);
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hal_write_segment_descriptor((void *) &_gdts[coreid][24], 0, 0,
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SEG_DPL_3 | SEG_CODE_DATA | SEG_PRESENT | SEG_LONG | SEG_TYPE_CODE_X);
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hal_write_segment_descriptor((void *) &_gdts[coreid][32], 0, 0,
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SEG_DPL_3 | SEG_CODE_DATA | SEG_PRESENT | SEG_LONG | SEG_TYPE_DATA_RW);
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hal_write_segment_descriptor((void *) &_gdts[coreid][40], 0, 0xFFFFF,
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SEG_DPL_0 | SEG_GRANULARITY | SEG_CODE_DATA | SEG_PRESENT | SEG_32_BITS |
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SEG_TYPE_CODE_X);
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hal_write_segment_descriptor((void *) &_gdts[coreid][48], 0, 0xFFFFF,
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SEG_DPL_0 | SEG_GRANULARITY | SEG_CODE_DATA | SEG_PRESENT | SEG_32_BITS |
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SEG_TYPE_DATA_RW);
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hal_write_segment_descriptor((void *) &_gdts[coreid][56], 0, 0xFFFFF,
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SEG_DPL_3 | SEG_GRANULARITY | SEG_CODE_DATA | SEG_PRESENT | SEG_32_BITS |
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SEG_TYPE_CODE_X);
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hal_write_segment_descriptor((void *) &_gdts[coreid][64], 0, 0xFFFFF,
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SEG_DPL_3 | SEG_GRANULARITY | SEG_CODE_DATA | SEG_PRESENT | SEG_32_BITS |
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SEG_TYPE_DATA_RW);
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_gdt_ptrs[coreid].base = (uint64_t) &_gdts[coreid];
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_gdt_ptrs[coreid].limit = GDT_ENTRY_NUM * GDT_ENTRY_SIZE - 1;
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hal_flush_gdt(&_gdt_ptrs[coreid], seg_selector(1, 0), seg_selector(2, 0));
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}
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void KABI hal_mem_init()
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{
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_hal_init_gdt();
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lb_salloc_init(kernel_heap, KERNEL_HEAP_SIZE);
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return;
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}
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