Add memory initialization to start_kernel.c
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@ -1,3 +1,4 @@
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#include <mm.h>
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#include <print.h>
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#include <devices/pl011.h>
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@ -5,21 +6,66 @@
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#include <framebuffer.h>
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#include <console.h>
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extern const unsigned int kernel_end;
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struct fb myfb;
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void video(void) {
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// unsigned int x, y;
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unsigned int x, y;
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pl111_init(&myfb, 24);
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// x = 0, y = 0;
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// for (y=0; y<480; y++)
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// for (x=0; x<640; x++)
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// fb_write_pixel(&myfb, x, y, 0x3f, 0x0, 0x6f);
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x = 0, y = 0;
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for (y=0; y<480; y++)
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for (x=0; x<640; x++)
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fb_write_pixel(&myfb, x, y, 0x3f, 0x0, 0x6f);
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console_init(&myfb);
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}
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void test_memory() {
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struct page *p, *q;
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p = mm_get_free_pages(0);
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if (p)
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print("%x, %x\n", p, p->address);
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else
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print("Error: failed to allocate memory for p\n");
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q = mm_get_free_pages(4);
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if (q)
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print("%x, %x\n", q, q->address);
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else
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print("Error: failed to allocate memory for q\n");
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mm_put_free_pages(p);
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mm_put_free_pages(q);
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q = mm_get_free_pages(1);
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if (q)
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print("%x, %x\n", q, q->address);
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else
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print("Error: failed to allocate memory for q\n");
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p = mm_get_free_pages(0);
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if (p)
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print("%x, %x\n", p, p->address);
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else
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print("Error: failed to allocate memory for p\n");
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}
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int main(void) {
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char *lower;
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print_init(&pl011_putc); //initialize the serial console
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//setup memory
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mm_init();
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mm_add_free_region((void*)0x60000000, (void*)0x7FFFFFFF);
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lower = (char*) &kernel_end;
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if ((unsigned int)lower % MM_PAGE_SIZE != 0)
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lower += (MM_PAGE_SIZE - ((unsigned int)lower % MM_PAGE_SIZE));
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mm_add_free_region((void*)lower, (void*)0x9FFFFFFF); //subtract the memory used by the kernel
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test_memory();
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video();
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return 0;
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