98 lines
2.9 KiB
C
98 lines
2.9 KiB
C
/*
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* Copyright (c) 2009 Corey Tabaka
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files
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* (the "Software"), to deal in the Software without restriction,
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* including without limitation the rights to use, copy, modify, merge,
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* publish, distribute, sublicense, and/or sell copies of the Software,
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* and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include <err.h>
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#include <debug.h>
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#include <arch/x86/mmu.h>
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#include <platform.h>
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#include "platform_p.h"
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#include <platform/pc.h>
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#include <platform/multiboot.h>
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#include <platform/console.h>
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#include <platform/keyboard.h>
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#include <dev/pci.h>
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extern multiboot_info_t *_multiboot_info;
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extern unsigned int _heap_end;
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void platform_init_mmu_mappings(void)
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{
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/* do some memory map initialization */
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}
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void platform_init_multiboot_info(void)
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{
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unsigned int i;
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if (_multiboot_info) {
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if (_multiboot_info->flags & MB_INFO_MEM_SIZE) {
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_heap_end = _multiboot_info->mem_upper * 1024;
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}
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if (_multiboot_info->flags & MB_INFO_MMAP) {
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memory_map_t *mmap = (memory_map_t *) (_multiboot_info->mmap_addr - 4);
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dprintf(DEBUG, "mmap length: %u\n", _multiboot_info->mmap_length);
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for (i=0; i < _multiboot_info->mmap_length / sizeof(memory_map_t); i++) {
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dprintf(DEBUG, "base=%08x, length=%08x, type=%02x\n",
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mmap[i].base_addr_low, mmap[i].length_low, mmap[i].type);
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if (mmap[i].type == MB_MMAP_TYPE_AVAILABLE && mmap[i].base_addr_low >= _heap_end) {
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_heap_end = mmap[i].base_addr_low + mmap[i].length_low;
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} else if (mmap[i].type != MB_MMAP_TYPE_AVAILABLE && mmap[i].base_addr_low >= _heap_end) {
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/*
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* break on first memory hole above default heap end for now.
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* later we can add facilities for adding free chunks to the
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* heap for each segregated memory region.
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*/
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break;
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}
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}
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}
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}
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}
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void platform_early_init(void)
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{
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/* update the heap end so we can take advantage of more ram */
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platform_init_multiboot_info();
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/* get the text console working */
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platform_init_console();
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/* initialize the interrupt controller */
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platform_init_interrupts();
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/* initialize the timer */
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platform_init_timer();
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}
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void platform_init(void)
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{
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platform_init_keyboard();
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pci_init();
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}
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