diff options
Diffstat (limited to 'src/smi_driver.c')
| -rw-r--r-- | src/smi_driver.c | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/smi_driver.c b/src/smi_driver.c index 7219612..c0e72e4 100644 --- a/src/smi_driver.c +++ b/src/smi_driver.c @@ -1423,6 +1423,55 @@ SMI_MapMmio(ScrnInfoPtr pScrn) return (TRUE); } +/* HACK - In some cases the BIOS hasn't filled in the "scratchpad + registers" (SR71) with the right amount of memory installed (e.g. MIPS + platform). Probe it manually. */ +static unsigned long +SMI_ProbeMem(ScrnInfoPtr pScrn, unsigned long mem_skip, unsigned long mem_max) +{ + SMIPtr pSmi = SMIPTR(pScrn); + unsigned long mem_probe = 1024*1024; + unsigned long aperture_base; + void* mem; + + ENTER(); + + aperture_base = PCI_REGION_BASE(pSmi->PciInfo, 0, REGION_MEM) + mem_skip; + mem_max = min(mem_max , PCI_REGION_SIZE(pSmi->PciInfo, 0) - mem_skip); + +#ifndef XSERVER_LIBPCIACCESS + mem = xf86MapPciMem(pScrn->scrnIndex, VIDMEM_MMIO, pSmi->PciTag, + aperture_base, mem_max); + + if(!mem) + LEAVE(0); +#else + if(pci_device_map_range(pSmi->PciInfo, aperture_base, mem_max, + PCI_DEV_MAP_FLAG_WRITABLE, &mem)) + LEAVE(0); +#endif + + while(mem_probe <= mem_max){ + MMIO_OUT32(mem, mem_probe-4, 0x55555555); + if(MMIO_IN32(mem, mem_probe-4) != 0x55555555) + break; + + MMIO_OUT32(mem, mem_probe-4, 0xAAAAAAAA); + if(MMIO_IN32(mem, mem_probe-4) != 0xAAAAAAAA) + break; + + mem_probe <<= 1; + } + +#ifndef XSERVER_LIBPCIACCESS + xf86UnMapVidMem(pScrn->scrnIndex, mem, mem_max); +#else + pci_device_unmap_range(pSmi->PciInfo, mem, mem_max); +#endif + + LEAVE(mem_probe >> 1); +} + static Bool SMI_DetectMem(ScrnInfoPtr pScrn) { @@ -1452,6 +1501,9 @@ SMI_DetectMem(ScrnInfoPtr pScrn) pSmi->videoRAMKBytes = lynx3d_table[config >> 6] * 1024 + 512; break; + case SMI_LYNXEMplus: + pSmi->videoRAMKBytes = SMI_ProbeMem(pScrn, 0, 0x400000) / 1024; + break; case SMI_LYNX3DM: pSmi->videoRAMKBytes = lynx3dm_table[config >> 6] * 1024; break; |