27 lines
499 B
C
27 lines
499 B
C
#include <kernel/util/draw.h>
|
|
#include <kernel/util/atomic.h>
|
|
|
|
// Internal Video RAM
|
|
uint32_t vram[256];
|
|
|
|
/* kvram_clear() - Wipe the Video RAM */
|
|
void kvram_clear(void)
|
|
{
|
|
int i;
|
|
|
|
// The Video RAM is shared between each
|
|
// process and the kernel, so we should
|
|
// use atomic operation when we use it.
|
|
atomic_start();
|
|
|
|
// Wipe Video RAM
|
|
// @note: here, we suppose that the VRAM is
|
|
// 4-aligned
|
|
i = 256;
|
|
while (--i >= 0)
|
|
vram[i] = 0x00000000;
|
|
|
|
// End of atomic operation
|
|
atomic_stop();
|
|
}
|