diff options
Diffstat (limited to 'gfxnvidia.c')
| -rw-r--r-- | gfxnvidia.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gfxnvidia.c b/gfxnvidia.c index 962ba1a..29e2910 100644 --- a/gfxnvidia.c +++ b/gfxnvidia.c @@ -25,6 +25,11 @@ #define PCI_VENDOR_ID_NVIDIA 0x10de +/* Mask to restrict flash accesses to a 128kB memory window. + * FIXME: Is this size a one-fits-all or card dependent? + */ +#define GFXNVIDIA_MEMMAP_MASK ((1 << 17) - 1) + uint8_t *nvidia_bar; const struct pcidev_status gfx_nvidia[] = { @@ -95,10 +100,10 @@ int gfxnvidia_shutdown(void) void gfxnvidia_chip_writeb(uint8_t val, chipaddr addr) { - mmio_writeb(val, nvidia_bar + addr); + mmio_writeb(val, nvidia_bar + (addr & GFXNVIDIA_MEMMAP_MASK)); } uint8_t gfxnvidia_chip_readb(const chipaddr addr) { - return mmio_readb(nvidia_bar + addr); + return mmio_readb(nvidia_bar + (addr & GFXNVIDIA_MEMMAP_MASK)); } |
