68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
#include <kernel/memory.h>
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#include <kernel/devices/earlyterm.h>
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// Internal data.
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struct memory_info pmemory;
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__attribute__((constructor(101)))
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void memory_init(void)
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{
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extern uint32_t ram_start;
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extern uint32_t srom;
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// Initialize RAM informations
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// TODO determine RAM's size
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pmemory.ram.end = (void *)0x88080000;
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pmemory.ram.start = (void *)(((uintptr_t)&ram_start + 3) >> 2 << 2);
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pmemory.ram.size = pmemory.ram.end - pmemory.ram.start;
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// Generate cache part
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pmemory.cache.delta = NULL;
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pmemory.cache.pages.number = 0;
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pmemory.cache.pages.size = PM_PAGE_SIZE;
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pmemory.cache.pages.list = pmemory.ram.start;
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pmemory.cache.pages.base_addr = pmemory.ram.end;
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while ((void *)&pmemory.cache.pages.list[pmemory.cache.pages.number] <
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pmemory.cache.pages.base_addr - PM_PAGE_SIZE)
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{
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pmemory.cache.pages.base_addr -= PM_PAGE_SIZE;
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pmemory.cache.pages.number += 1;
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}
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// Initialize kernel heap
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pmemory.kheap = NULL;
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// Debug
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/* earlyterm_write("kernel = %do -> %dko\n", &srom, (uint32_t)&srom / 1024);
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earlyterm_write("ram start = %p\n", pmemory.ram.start);
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earlyterm_write("ram end = %p\n", pmemory.ram.end);
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earlyterm_write("ram size = %do -> %dko\n", pmemory.ram.size, pmemory.ram.size / 1024);
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earlyterm_write("page size = %do -> %#xo\n", pmemory.cache.pages.size, pmemory.cache.pages.size);
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earlyterm_write("page num = %d\n", pmemory.cache.pages.number);
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earlyterm_write("real RAM = %d -> %dko\n", pmemory.cache.pages.number * PM_PAGE_SIZE, (pmemory.cache.pages.number * PM_PAGE_SIZE) / 1024);
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*/
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// Initialize cache page list
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for (int i = 0 ; i < pmemory.cache.pages.number ; i = i + 1)
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{
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pmemory.cache.pages.list[i].status = PAGE_UNUSED;
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pmemory.cache.pages.list[i].next = NULL;
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}
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// TEST part
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/* void *test0 = pm_alloc(16);
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void *test1 = pm_alloc(128);
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void *test2 = pm_alloc(80);
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earlyterm_write("test0 = %p\n", test0);
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earlyterm_write("test1 = %p\n", test1);
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earlyterm_write("test2 = %p\n", test2);
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pm_free(test2);
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pm_free(test0);
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pm_heap_debug();
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DBG_WAIT;
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pm_free(test1);
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pm_debug();
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pm_free((void*)0xa0000000);
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DBG_WAIT;
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while (1);*/
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}
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