diff options
author | Simon Glass <sjg@chromium.org> | 2014-11-13 05:42:14 (GMT) |
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committer | Simon Glass <sjg@chromium.org> | 2014-11-21 06:34:12 (GMT) |
commit | 6fb3b72e8745073465b4a5875b7750cc43cbd1af (patch) | |
tree | e4a798cc0d1a9741752d0b4adde393d1d4d1e936 /arch/x86/cpu/pci.c | |
parent | 6e5b12b6144acd83dcfb4a79ea0beff787f3f545 (diff) | |
download | u-boot-6fb3b72e8745073465b4a5875b7750cc43cbd1af.tar.xz |
x86: pci: Allow configuration before relocation
Add simple PCI access routines for x86 which permit use before relocation.
The normal PCI stack is still used, but for pre-relocation use there can
only ever be a single hose. After relocation, fall back to the normal
access, although even then on x86 machines there is normally only a single
PCI bus.
Signed-off-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'arch/x86/cpu/pci.c')
-rw-r--r-- | arch/x86/cpu/pci.c | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/arch/x86/cpu/pci.c b/arch/x86/cpu/pci.c index 2d8f16c..e399388 100644 --- a/arch/x86/cpu/pci.c +++ b/arch/x86/cpu/pci.c @@ -46,3 +46,53 @@ void pci_init_board(void) hose->last_busno = pci_hose_scan(hose); } + +static struct pci_controller *get_hose(void) +{ + if (gd->arch.hose) + return gd->arch.hose; + + return pci_bus_to_hose(0); +} + +unsigned int pci_read_config8(pci_dev_t dev, unsigned where) +{ + uint8_t value; + + pci_hose_read_config_byte(get_hose(), dev, where, &value); + + return value; +} + +unsigned int pci_read_config16(pci_dev_t dev, unsigned where) +{ + uint16_t value; + + pci_hose_read_config_word(get_hose(), dev, where, &value); + + return value; +} + +unsigned int pci_read_config32(pci_dev_t dev, unsigned where) +{ + uint32_t value; + + pci_hose_read_config_dword(get_hose(), dev, where, &value); + + return value; +} + +void pci_write_config8(pci_dev_t dev, unsigned where, unsigned value) +{ + pci_hose_write_config_byte(get_hose(), dev, where, value); +} + +void pci_write_config16(pci_dev_t dev, unsigned where, unsigned value) +{ + pci_hose_write_config_word(get_hose(), dev, where, value); +} + +void pci_write_config32(pci_dev_t dev, unsigned where, unsigned value) +{ + pci_hose_write_config_dword(get_hose(), dev, where, value); +} |