diff options
Diffstat (limited to 'src/hw/pci.c')
| -rw-r--r-- | src/hw/pci.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/hw/pci.c b/src/hw/pci.c index ecc724b..3f35250 100644 --- a/src/hw/pci.c +++ b/src/hw/pci.c @@ -31,8 +31,40 @@ static u32 ioconfig_cmd(u16 bdf, u32 addr) return 0x80000000 | (bdf << 8) | (addr & 0xfc); } +/* + * Memory mapped I/O + * + * readX()/writeX() do byteswapping and take an ioremapped address + * __raw_readX()/__raw_writeX() don't byteswap and take an ioremapped address. + * gsc_*() don't byteswap and operate on physical addresses; + * eg dev->hpa or 0xfee00000. + */ + +/* each elroy has 0x2000 offset */ +#define ELROY_MAX_BUSSES 4 +unsigned long elroy_offset(u16 bdf) +{ + static const int elroy_hpa_offsets[ELROY_MAX_BUSSES] = { 0x30000, 0x32000, 0x38000, 0x3c000 }; + int bus = pci_bdf_to_bus(bdf); + if (bus >= ELROY_MAX_BUSSES) + return -1UL; + return elroy_hpa_offsets[bus] - elroy_hpa_offsets[0]; +} + +void *elroy_port(unsigned long port, unsigned long offs) +{ + return (void *)(port + offs); +} + void pci_config_writel(u16 bdf, u32 addr, u32 val) { + if (has_astro) { + unsigned long offs = elroy_offset(bdf); + if (offs == -1UL) + return; + writel(elroy_port(PORT_PCI_CMD, offs), ioconfig_cmd((u8)bdf, addr)); + writel(elroy_port(PORT_PCI_DATA, offs), val); + } else if (!MODESEGMENT && mmconfig) { writel(mmconfig_addr(bdf, addr), val); } else { @@ -43,6 +75,13 @@ void pci_config_writel(u16 bdf, u32 addr, u32 val) void pci_config_writew(u16 bdf, u32 addr, u16 val) { + if (has_astro) { + unsigned long offs = elroy_offset(bdf); + if (offs == -1UL) + return; + writel(elroy_port(PORT_PCI_CMD, offs), ioconfig_cmd((u8)bdf, addr)); + writew(elroy_port(PORT_PCI_DATA + (addr & 2), offs), val); + } else if (!MODESEGMENT && mmconfig) { writew(mmconfig_addr(bdf, addr), val); } else { @@ -53,6 +92,13 @@ void pci_config_writew(u16 bdf, u32 addr, u16 val) void pci_config_writeb(u16 bdf, u32 addr, u8 val) { + if (has_astro) { + unsigned long offs = elroy_offset(bdf); + if (offs == -1UL) + return; + writel(elroy_port(PORT_PCI_CMD, offs), ioconfig_cmd((u8)bdf, addr)); + writeb(elroy_port(PORT_PCI_DATA + (addr & 3), offs), val); + } else if (!MODESEGMENT && mmconfig) { writeb(mmconfig_addr(bdf, addr), val); } else { @@ -63,6 +109,13 @@ void pci_config_writeb(u16 bdf, u32 addr, u8 val) u32 pci_config_readl(u16 bdf, u32 addr) { + if (has_astro) { + unsigned long offs = elroy_offset(bdf); + if (offs == -1UL) + return -1; + writel(elroy_port(PORT_PCI_CMD, offs), ioconfig_cmd((u8)bdf, addr)); + return readl(elroy_port(PORT_PCI_DATA, offs)); + } else if (!MODESEGMENT && mmconfig) { return readl(mmconfig_addr(bdf, addr)); } else { @@ -73,6 +126,13 @@ u32 pci_config_readl(u16 bdf, u32 addr) u16 pci_config_readw(u16 bdf, u32 addr) { + if (has_astro) { + unsigned long offs = elroy_offset(bdf); + if (offs == -1UL) + return -1; + writel(elroy_port(PORT_PCI_CMD, offs), ioconfig_cmd((u8)bdf, addr)); + return readw(elroy_port(PORT_PCI_DATA + (addr & 2), offs)); + } else if (!MODESEGMENT && mmconfig) { return readw(mmconfig_addr(bdf, addr)); } else { @@ -83,6 +143,13 @@ u16 pci_config_readw(u16 bdf, u32 addr) u8 pci_config_readb(u16 bdf, u32 addr) { + if (has_astro) { + unsigned long offs = elroy_offset(bdf); + if (offs == -1UL) + return -1; + writel(elroy_port(PORT_PCI_CMD, offs), ioconfig_cmd((u8)bdf, addr)); + return readb(elroy_port(PORT_PCI_DATA + (addr & 3), offs)); + } else if (!MODESEGMENT && mmconfig) { return readb(mmconfig_addr(bdf, addr)); } else { |