From d2dd482bc17c3bc240045f80a7c4b4d5cea5e29c Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Wed, 30 Nov 2005 16:57:28 +1100 Subject: [PATCH] powerpc: Update OF address parsers This updates the OF address parsers to return the IO flags indicating the type of address obtained. It also adds a PCI call for converting physical addresses that hit IO space into into IO tokens, and add routines that return the translated addresses into struct resource Signed-off-by: Benjamin Herrenschmidt Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/prom_parse.c | 165 ++++++++++++++++++++++++++++++++++----- 1 file changed, 146 insertions(+), 19 deletions(-) (limited to 'arch/powerpc/kernel/prom_parse.c') diff --git a/arch/powerpc/kernel/prom_parse.c b/arch/powerpc/kernel/prom_parse.c index 23c85af53d4..5b764277f47 100644 --- a/arch/powerpc/kernel/prom_parse.c +++ b/arch/powerpc/kernel/prom_parse.c @@ -4,7 +4,9 @@ #include #include #include +#include #include +#include #ifdef DEBUG #define DBG(fmt...) do { printk(fmt); } while(0) @@ -54,6 +56,7 @@ struct of_bus { int *addrc, int *sizec); u64 (*map)(u32 *addr, u32 *range, int na, int ns, int pna); int (*translate)(u32 *addr, u64 offset, int na); + unsigned int (*get_flags)(u32 *addr); }; @@ -61,8 +64,8 @@ struct of_bus { * Default translator (generic bus) */ -static void of_default_count_cells(struct device_node *dev, - int *addrc, int *sizec) +static void of_bus_default_count_cells(struct device_node *dev, + int *addrc, int *sizec) { if (addrc) *addrc = prom_n_addr_cells(dev); @@ -70,7 +73,7 @@ static void of_default_count_cells(struct device_node *dev, *sizec = prom_n_size_cells(dev); } -static u64 of_default_map(u32 *addr, u32 *range, int na, int ns, int pna) +static u64 of_bus_default_map(u32 *addr, u32 *range, int na, int ns, int pna) { u64 cp, s, da; @@ -86,7 +89,7 @@ static u64 of_default_map(u32 *addr, u32 *range, int na, int ns, int pna) return da - cp; } -static int of_default_translate(u32 *addr, u64 offset, int na) +static int of_bus_default_translate(u32 *addr, u64 offset, int na) { u64 a = of_read_addr(addr, na); memset(addr, 0, na * 4); @@ -98,6 +101,11 @@ static int of_default_translate(u32 *addr, u64 offset, int na) return 0; } +static unsigned int of_bus_default_get_flags(u32 *addr) +{ + return IORESOURCE_MEM; +} + /* * PCI bus specific translator @@ -139,7 +147,24 @@ static u64 of_bus_pci_map(u32 *addr, u32 *range, int na, int ns, int pna) static int of_bus_pci_translate(u32 *addr, u64 offset, int na) { - return of_default_translate(addr + 1, offset, na - 1); + return of_bus_default_translate(addr + 1, offset, na - 1); +} + +static unsigned int of_bus_pci_get_flags(u32 *addr) +{ + unsigned int flags = 0; + u32 w = addr[0]; + + switch((w >> 24) & 0x03) { + case 0x01: + flags |= IORESOURCE_IO; + case 0x02: /* 32 bits */ + case 0x03: /* 64 bits */ + flags |= IORESOURCE_MEM; + } + if (w & 0x40000000) + flags |= IORESOURCE_PREFETCH; + return flags; } /* @@ -182,9 +207,22 @@ static u64 of_bus_isa_map(u32 *addr, u32 *range, int na, int ns, int pna) static int of_bus_isa_translate(u32 *addr, u64 offset, int na) { - return of_default_translate(addr + 1, offset, na - 1); + return of_bus_default_translate(addr + 1, offset, na - 1); +} + +static unsigned int of_bus_isa_get_flags(u32 *addr) +{ + unsigned int flags = 0; + u32 w = addr[0]; + + if (w & 1) + flags |= IORESOURCE_IO; + else + flags |= IORESOURCE_MEM; + return flags; } + /* * Array of bus specific translators */ @@ -198,6 +236,7 @@ static struct of_bus of_busses[] = { .count_cells = of_bus_pci_count_cells, .map = of_bus_pci_map, .translate = of_bus_pci_translate, + .get_flags = of_bus_pci_get_flags, }, /* ISA */ { @@ -207,15 +246,17 @@ static struct of_bus of_busses[] = { .count_cells = of_bus_isa_count_cells, .map = of_bus_isa_map, .translate = of_bus_isa_translate, + .get_flags = of_bus_isa_get_flags, }, /* Default */ { .name = "default", .addresses = "reg", .match = NULL, - .count_cells = of_default_count_cells, - .map = of_default_map, - .translate = of_default_translate, + .count_cells = of_bus_default_count_cells, + .map = of_bus_default_map, + .translate = of_bus_default_translate, + .get_flags = of_bus_default_get_flags, }, }; @@ -254,7 +295,8 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus, ranges = (u32 *)get_property(parent, "ranges", &rlen); if (ranges == NULL || rlen == 0) { offset = of_read_addr(addr, na); - memset(addr, 0, pna); + memset(addr, 0, pna * 4); + DBG("OF: no ranges, 1:1 translation\n"); goto finish; } @@ -370,7 +412,8 @@ u64 of_translate_address(struct device_node *dev, u32 *in_addr) } EXPORT_SYMBOL(of_translate_address); -u32 *of_get_address(struct device_node *dev, int index, u64 *size) +u32 *of_get_address(struct device_node *dev, int index, u64 *size, + unsigned int *flags) { u32 *prop; unsigned int psize; @@ -399,22 +442,106 @@ u32 *of_get_address(struct device_node *dev, int index, u64 *size) if (i == index) { if (size) *size = of_read_addr(prop + na, ns); + if (flags) + *flags = bus->get_flags(prop); return prop; } return NULL; } EXPORT_SYMBOL(of_get_address); -u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size) +u32 *of_get_pci_address(struct device_node *dev, int bar_no, u64 *size, + unsigned int *flags) { - u32 *addr; - int index; + u32 *prop; + unsigned int psize; + struct device_node *parent; + struct of_bus *bus; + int onesize, i, na, ns; - for (index = 0; (addr = of_get_address(dev, index, size)) != NULL; - index++) { - if ((addr[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) - return addr; - } + /* Get parent & match bus type */ + parent = of_get_parent(dev); + if (parent == NULL) + return NULL; + bus = of_match_bus(parent); + if (strcmp(bus->name, "pci")) + return NULL; + bus->count_cells(dev, &na, &ns); + of_node_put(parent); + if (!OF_CHECK_COUNTS(na, ns)) + return NULL; + + /* Get "reg" or "assigned-addresses" property */ + prop = (u32 *)get_property(dev, bus->addresses, &psize); + if (prop == NULL) + return NULL; + psize /= 4; + + onesize = na + ns; + for (i = 0; psize >= onesize; psize -= onesize, prop += onesize, i++) + if ((prop[0] & 0xff) == ((bar_no * 4) + PCI_BASE_ADDRESS_0)) { + if (size) + *size = of_read_addr(prop + na, ns); + if (flags) + *flags = bus->get_flags(prop); + return prop; + } return NULL; } EXPORT_SYMBOL(of_get_pci_address); + +static int __of_address_to_resource(struct device_node *dev, u32 *addrp, + u64 size, unsigned int flags, + struct resource *r) +{ + u64 taddr; + + if ((flags & (IORESOURCE_IO | IORESOURCE_MEM)) == 0) + return -EINVAL; + taddr = of_translate_address(dev, addrp); + if (taddr == OF_BAD_ADDR) + return -EINVAL; + memset(r, 0, sizeof(struct resource)); + if (flags & IORESOURCE_IO) { + unsigned int port; + port = pci_address_to_pio(taddr); + if (port == (unsigned int)-1) + return -EINVAL; + r->start = port; + r->end = port + size - 1; + } else { + r->start = taddr; + r->end = taddr + size - 1; + } + r->flags = flags; + r->name = dev->name; + return 0; +} + +int of_address_to_resource(struct device_node *dev, int index, + struct resource *r) +{ + u32 *addrp; + u64 size; + unsigned int flags; + + addrp = of_get_address(dev, index, &size, &flags); + if (addrp == NULL) + return -EINVAL; + return __of_address_to_resource(dev, addrp, size, flags, r); +} +EXPORT_SYMBOL_GPL(of_address_to_resource); + +int of_pci_address_to_resource(struct device_node *dev, int bar, + struct resource *r) +{ + u32 *addrp; + u64 size; + unsigned int flags; + + addrp = of_get_pci_address(dev, bar, &size, &flags); + if (addrp == NULL) + return -EINVAL; + return __of_address_to_resource(dev, addrp, size, flags, r); +} +EXPORT_SYMBOL_GPL(of_pci_address_to_resource); -- cgit v1.2.3-18-g5258