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| author | Gary Jennejohn <garyj@denx.de> | 2007-08-31 15:21:46 +0200 |
|---|---|---|
| committer | Stefan Roese <sr@denx.de> | 2007-08-31 15:21:46 +0200 |
| commit | 81b73dec16fd1227369a191e725e10044a9d56b8 (patch) | |
| tree | 3d0fe0f95120227c7ced28cc3ff742e35d22dd71 | |
| parent | 9c02defc29b57945b600714cf61ddfd02b02fb14 (diff) | |
| download | talos-obmc-uboot-81b73dec16fd1227369a191e725e10044a9d56b8.tar.gz talos-obmc-uboot-81b73dec16fd1227369a191e725e10044a9d56b8.zip | |
ppc4xx: (Re-)Enable CONFIG_PCI_PNP on AMCC 440EPx Sequoia
The 440EPx has a problem when the PCI_CACHE_LINE_SIZE register is
set to non-zero, because it doesn't support MRM (memory-read-
multiple) correctly. We now added the possibility to configure
this register in the board config file, so that the default value
of 8 can be overridden.
Here the details of this patch:
o drivers_pci_auto.c: introduce CFG_PCI_CACHE_LINE_SIZE to allow
board-specific settings. As an example the sequoia board requires 0.
Idea from Stefan Roese <sr@denx.de>.
o board/amcc/sequoia/init.S: add a TLB mapping at 0xE8000000 for the
PCI IO-space. Obtained from Stefan Roese <sr@denx.de>.
o include/configs/sequoia.h: turn CONFIG_PCI_PNP back on and set
CFG_PCI_CACHE_LINE_SIZE to 0.
Signed-off-by: Gary Jennejohn <garyj@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
| -rw-r--r-- | board/amcc/sequoia/init.S | 3 | ||||
| -rw-r--r-- | drivers/pci_auto.c | 8 | ||||
| -rw-r--r-- | include/configs/sequoia.h | 3 |
3 files changed, 12 insertions, 2 deletions
diff --git a/board/amcc/sequoia/init.S b/board/amcc/sequoia/init.S index 45bcd4bef7..5fe3af9a09 100644 --- a/board/amcc/sequoia/init.S +++ b/board/amcc/sequoia/init.S @@ -126,6 +126,9 @@ tlbtab: /* TLB-entry for peripherals */ tlbentry( 0xEF000000, SZ_16M, 0xEF000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I) + /* TLB-entry PCI IO Space - from sr@denx.de */ + tlbentry(0xE8000000, SZ_64K, 0xE8000000, 1, AC_R|AC_W|AC_X|SA_G|SA_I) + tlbtab_end #if defined(CONFIG_NAND_U_BOOT) && !defined(CONFIG_NAND_SPL) diff --git a/drivers/pci_auto.c b/drivers/pci_auto.c index 2378553be5..acfda83ba5 100644 --- a/drivers/pci_auto.c +++ b/drivers/pci_auto.c @@ -28,6 +28,11 @@ #define PCIAUTO_IDE_MODE_MASK 0x05 +/* the user can define CFG_PCI_CACHE_LINE_SIZE to avoid problems */ +#ifndef CFG_PCI_CACHE_LINE_SIZE +#define CFG_PCI_CACHE_LINE_SIZE 8 +#endif + /* * */ @@ -150,7 +155,8 @@ void pciauto_setup_device(struct pci_controller *hose, } pci_hose_write_config_dword(hose, dev, PCI_COMMAND, cmdstat); - pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, 0x08); + pci_hose_write_config_byte(hose, dev, PCI_CACHE_LINE_SIZE, + CFG_PCI_CACHE_LINE_SIZE); pci_hose_write_config_byte(hose, dev, PCI_LATENCY_TIMER, 0x80); } diff --git a/include/configs/sequoia.h b/include/configs/sequoia.h index 824a81240c..c2e1386217 100644 --- a/include/configs/sequoia.h +++ b/include/configs/sequoia.h @@ -400,7 +400,8 @@ *----------------------------------------------------------------------*/ /* General PCI */ #define CONFIG_PCI /* include pci support */ -#undef CONFIG_PCI_PNP /* do (not) pci plug-and-play */ +#define CONFIG_PCI_PNP /* do pci plug-and-play */ +#define CFG_PCI_CACHE_LINE_SIZE 0 /* to avoid problems with PNP */ #define CONFIG_PCI_SCAN_SHOW /* show pci devices on startup */ #define CFG_PCI_TARGBASE 0x80000000 /* PCIaddr mapped to CFG_PCI_MEMBASE*/ |
