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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-05-22 14:35:11 -0700 |
|---|---|---|
| committer | Jesse Barnes <jbarnes@virtuousgeek.org> | 2008-06-10 10:59:52 -0700 |
| commit | e3f2baebf4209b5927e23fa65d5977d31db936b3 (patch) | |
| tree | 2f5b9850f13f0ce1cefcf1ba5144933f4bb93470 /arch/x86/pci | |
| parent | e7891c733f9b26c851edde50cf886a30bd133dbd (diff) | |
| download | kernel_samsung_smdk4412-e3f2baebf4209b5927e23fa65d5977d31db936b3.zip kernel_samsung_smdk4412-e3f2baebf4209b5927e23fa65d5977d31db936b3.tar.gz kernel_samsung_smdk4412-e3f2baebf4209b5927e23fa65d5977d31db936b3.tar.bz2 | |
PCI/x86: early dump pci conf space v2
Allows us to dump PCI space before any kernel changes have been made.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Diffstat (limited to 'arch/x86/pci')
| -rw-r--r-- | arch/x86/pci/common.c | 4 | ||||
| -rw-r--r-- | arch/x86/pci/early.c | 51 |
2 files changed, 55 insertions, 0 deletions
diff --git a/arch/x86/pci/common.c b/arch/x86/pci/common.c index 3a5261b..d19fd07 100644 --- a/arch/x86/pci/common.c +++ b/arch/x86/pci/common.c @@ -20,6 +20,7 @@ unsigned int pci_probe = PCI_PROBE_BIOS | PCI_PROBE_CONF1 | PCI_PROBE_CONF2 | PCI_PROBE_MMCONF; +unsigned int pci_early_dump_regs; static int pci_bf_sort; int pci_routeirq; int pcibios_last_bus = -1; @@ -511,6 +512,9 @@ char * __devinit pcibios_setup(char *str) } else if (!strcmp(str, "use_crs")) { pci_probe |= PCI_USE__CRS; return NULL; + } else if (!strcmp(str, "earlydump")) { + pci_early_dump_regs = 1; + return NULL; } else if (!strcmp(str, "routeirq")) { pci_routeirq = 1; return NULL; diff --git a/arch/x86/pci/early.c b/arch/x86/pci/early.c index 8e2821e..858dbe3 100644 --- a/arch/x86/pci/early.c +++ b/arch/x86/pci/early.c @@ -64,3 +64,54 @@ int early_pci_allowed(void) return (pci_probe & (PCI_PROBE_CONF1|PCI_PROBE_NOEARLY)) == PCI_PROBE_CONF1; } + +void early_dump_pci_device(u8 bus, u8 slot, u8 func) +{ + int i; + int j; + u32 val; + + printk("PCI: %02x:%02x:%02x", bus, slot, func); + + for (i = 0; i < 256; i += 4) { + if (!(i & 0x0f)) + printk("\n%04x:",i); + + val = read_pci_config(bus, slot, func, i); + for (j = 0; j < 4; j++) { + printk(" %02x", val & 0xff); + val >>= 8; + } + } + printk("\n"); +} + +void early_dump_pci_devices(void) +{ + unsigned bus, slot, func; + + if (!early_pci_allowed()) + return; + + for (bus = 0; bus < 256; bus++) { + for (slot = 0; slot < 32; slot++) { + for (func = 0; func < 8; func++) { + u32 class; + u8 type; + class = read_pci_config(bus, slot, func, + PCI_CLASS_REVISION); + if (class == 0xffffffff) + break; + + early_dump_pci_device(bus, slot, func); + + /* No multi-function device? */ + type = read_pci_config_byte(bus, slot, func, + PCI_HEADER_TYPE); + if (!(type & 0x80)) + break; + } + } + } +} + |