diff options
Diffstat (limited to 'drivers/of/address.c')
| -rw-r--r-- | drivers/of/address.c | 32 |
1 files changed, 19 insertions, 13 deletions
diff --git a/drivers/of/address.c b/drivers/of/address.c index 7c8221d36329..8fb2b5769733 100644 --- a/drivers/of/address.c +++ b/drivers/of/address.c @@ -69,14 +69,6 @@ static u64 of_bus_default_map(__be32 *addr, const __be32 *range, (unsigned long long)cp, (unsigned long long)s, (unsigned long long)da); - /* - * If the number of address cells is larger than 2 we assume the - * mapping doesn't specify a physical address. Rather, the address - * specifies an identifier that must match exactly. - */ - if (na > 2 && memcmp(range, addr, na * 4) != 0) - return OF_BAD_ADDR; - if (da < cp || da >= (cp + s)) return OF_BAD_ADDR; return da - cp; @@ -107,11 +99,12 @@ static unsigned int of_bus_default_get_flags(const __be32 *addr) static int of_bus_pci_match(struct device_node *np) { /* + * "pciex" is PCI Express * "vci" is for the /chaos bridge on 1st-gen PCI powermacs * "ht" is hypertransport */ - return !strcmp(np->type, "pci") || !strcmp(np->type, "vci") || - !strcmp(np->type, "ht"); + return !strcmp(np->type, "pci") || !strcmp(np->type, "pciex") || + !strcmp(np->type, "vci") || !strcmp(np->type, "ht"); } static void of_bus_pci_count_cells(struct device_node *np, @@ -341,6 +334,21 @@ static struct of_bus *of_match_bus(struct device_node *np) return NULL; } +static int of_empty_ranges_quirk(void) +{ + if (IS_ENABLED(CONFIG_PPC)) { + /* To save cycles, we cache the result */ + static int quirk_state = -1; + + if (quirk_state < 0) + quirk_state = + of_machine_is_compatible("Power Macintosh") || + of_machine_is_compatible("MacRISC"); + return quirk_state; + } + return false; +} + static int of_translate_one(struct device_node *parent, struct of_bus *bus, struct of_bus *pbus, __be32 *addr, int na, int ns, int pna, const char *rprop) @@ -366,12 +374,10 @@ static int of_translate_one(struct device_node *parent, struct of_bus *bus, * This code is only enabled on powerpc. --gcl */ ranges = of_get_property(parent, rprop, &rlen); -#if !defined(CONFIG_PPC) - if (ranges == NULL) { + if (ranges == NULL && !of_empty_ranges_quirk()) { pr_err("OF: no ranges; cannot translate\n"); return 1; } -#endif /* !defined(CONFIG_PPC) */ if (ranges == NULL || rlen == 0) { offset = of_read_number(addr, na); memset(addr, 0, pna * 4); |