Initial x86 port
diff --git a/platform/x86/platform.c b/platform/x86/platform.c
new file mode 100644
index 0000000..5d76237
--- /dev/null
+++ b/platform/x86/platform.c
@@ -0,0 +1,95 @@
+/*
+ * Copyright (c) 2009 Corey Tabaka
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files
+ * (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, sublicense, and/or sell copies of the Software,
+ * and to permit persons to whom the Software is furnished to do so,
+ * subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+#include <err.h>
+#include <debug.h>
+#include <arch/x86/mmu.h>
+#include <platform.h>
+#include "platform_p.h"
+#include <platform/x86.h>
+#include <platform/multiboot.h>
+#include <platform/console.h>
+#include <platform/keyboard.h>
+
+extern multiboot_info_t *_multiboot_info;
+extern unsigned int _heap_end;
+
+void platform_init_mmu_mappings(void)
+{
+ /* do some memory map initialization */
+}
+
+
+void platform_init_multiboot_info(void)
+{
+ unsigned int i;
+
+ if (_multiboot_info) {
+ if (_multiboot_info->flags & MB_INFO_MEM_SIZE) {
+ _heap_end = _multiboot_info->mem_upper * 1024;
+ }
+
+ if (_multiboot_info->flags & MB_INFO_MMAP) {
+ memory_map_t *mmap = (memory_map_t *) (_multiboot_info->mmap_addr - 4);
+
+ dprintf(DEBUG, "mmap length: %u\n", _multiboot_info->mmap_length);
+
+ for (i=0; i < _multiboot_info->mmap_length / sizeof(memory_map_t); i++) {
+ dprintf(DEBUG, "base=%08x, length=%08x, type=%02x\n",
+ mmap[i].base_addr_low, mmap[i].length_low, mmap[i].type);
+
+ if (mmap[i].type == MB_MMAP_TYPE_AVAILABLE && mmap[i].base_addr_low >= _heap_end) {
+ _heap_end = mmap[i].base_addr_low + mmap[i].length_low;
+ } else if (mmap[i].type != MB_MMAP_TYPE_AVAILABLE && mmap[i].base_addr_low >= _heap_end) {
+ /*
+ * break on first memory hole above default heap end for now.
+ * later we can add facilities for adding free chunks to the
+ * heap for each segregated memory region.
+ */
+ break;
+ }
+ }
+ }
+ }
+}
+
+void platform_early_init(void)
+{
+ /* update the heap end so we can take advantage of more ram */
+ platform_init_multiboot_info();
+
+ /* get the text console working */
+ platform_init_console();
+
+ /* initialize the interrupt controller */
+ platform_init_interrupts();
+
+ /* initialize the timer */
+ platform_init_timer();
+}
+
+void platform_init(void)
+{
+ platform_init_keyboard();
+
+}
+