diff options
Diffstat (limited to 'src/cpu/samsung/exynos5250/cpu.c')
| -rw-r--r-- | src/cpu/samsung/exynos5250/cpu.c | 25 |
1 files changed, 22 insertions, 3 deletions
diff --git a/src/cpu/samsung/exynos5250/cpu.c b/src/cpu/samsung/exynos5250/cpu.c index e122413f50..8bf0d49f96 100644 --- a/src/cpu/samsung/exynos5250/cpu.c +++ b/src/cpu/samsung/exynos5250/cpu.c @@ -5,6 +5,7 @@ #include <console/console.h> #include <device/device.h> #include <cbmem.h> +#include <arch/cache.h> #include <cpu/samsung/exynos5250/fimd.h> #include <cpu/samsung/exynos5-common/s5p-dp-core.h> #include "chip.h" @@ -32,7 +33,6 @@ static void exynos_displayport_init(device_t dev) unsigned long int fb_size; u32 lcdbase; - printk(BIOS_SPEW, "%s: dev 0x%p, conf 0x%p\n", __func__, dev, conf); memset(&vi, 0, sizeof(vi)); memset(&panel, 0, sizeof(panel)); @@ -61,16 +61,35 @@ static void exynos_displayport_init(device_t dev) * The size is a magic number from hardware. Allocate enough for the * frame buffer and color map. */ - fb_size = conf->xres * conf->yres * sizeof(unsigned long); + fb_size = conf->xres * conf->yres * (conf->bpp / 8); lcdbase = (uintptr_t)cbmem_add(CBMEM_ID_CONSOLE, fb_size + 64*KiB); printk(BIOS_SPEW, "lcd colormap base is %p\n", (void *)(lcdbase)); mmio_resource(dev, 0, lcdbase/KiB, 64); vi.cmap = (void *)lcdbase; + /* + * We need to clean and invalidate the framebuffer region and disable + * caching as well. We assume that our dcache <--> memory address + * space is identity-mapped in 1MB chunks, so align accordingly. + * + * Note: We may want to do something clever to ensure the framebuffer + * region is aligned such that we don't change dcache policy for other + * stuff inadvertantly. + * + * FIXME: Is disabling/re-enabling the MMU entirely necessary? + */ + uint32_t lower = ALIGN_DOWN(lcdbase, MiB); + uint32_t upper = ALIGN_UP(lcdbase + fb_size + 64*KiB, MiB); + dcache_clean_invalidate_by_mva(lower, upper - lower); + dcache_mmu_disable(); + mmu_config_range(lower/MiB, (upper - lower)/MiB, DCACHE_OFF); + dcache_mmu_enable(); + lcdbase += 64*KiB; mmio_resource(dev, 1, lcdbase/KiB, (fb_size + KiB - 1)/KiB); printk(BIOS_DEBUG, - "Initializing exynos VGA, base %p\n",(void *)lcdbase); + "Initializing exynos VGA, base %p\n", (void *)lcdbase); + memset((void *)lcdbase, 0, fb_size); /* clear the framebuffer */ ret = lcd_ctrl_init(&vi, &panel, (void *)lcdbase); } |