diff options
| -rw-r--r-- | src/northbridge/via/vx900/memmap.c | 17 |
1 files changed, 11 insertions, 6 deletions
diff --git a/src/northbridge/via/vx900/memmap.c b/src/northbridge/via/vx900/memmap.c index 0c3b7bfc76..d11dc65fd6 100644 --- a/src/northbridge/via/vx900/memmap.c +++ b/src/northbridge/via/vx900/memmap.c @@ -21,6 +21,7 @@ #include <device/pci_ops.h> #include <cbmem.h> #include <console/console.h> +#include <lib.h> #include "vx900.h" @@ -78,12 +79,16 @@ void vx900_set_chrome9hd_fb_size(u32 size_mb) size_mb = max_size_mb; } - /* Now round the framebuffer size to the closest power of 2 */ - u8 fb_pow = 0; - while (size_mb >> fb_pow) - fb_pow++; - fb_pow--; - size_mb = (1 << fb_pow); + /* Now round down the framebuffer size to the closest power of 2 */ + if (size_mb == 0) + die("Framebuffer size is 0\n"); + + int fb_pow = log2(size_mb); + + size_mb = 1U << fb_pow; + + if (size_mb < CHROME_9_HD_MIN_FB_SIZE || size_mb > CHROME_9_HD_MAX_FB_SIZE) + die("Framebuffer size %u is out of range\n", size_mb); pci_update_config8(MCU, 0xa1, ~(7 << 4), (fb_pow - 2) << 4); } |