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author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-11 07:10:07 +0100 |
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committer | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2009-03-11 07:10:07 +0100 |
commit | e14eee56c2280953c6e3d24d5dce42bd90836b81 (patch) | |
tree | 21ab792d9ad6fbbab460058f352a0158f995644e /arch/powerpc/sysdev/ppc4xx_pci.c | |
parent | Merge commit 'gcl/next' into next (diff) | |
parent | Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/c... (diff) | |
download | linux-e14eee56c2280953c6e3d24d5dce42bd90836b81.tar.xz linux-e14eee56c2280953c6e3d24d5dce42bd90836b81.zip |
Merge commit 'origin/master' into next
Diffstat (limited to 'arch/powerpc/sysdev/ppc4xx_pci.c')
-rw-r--r-- | arch/powerpc/sysdev/ppc4xx_pci.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/ppc4xx_pci.c b/arch/powerpc/sysdev/ppc4xx_pci.c index ef0fafcbfbcb..6a2d473c345a 100644 --- a/arch/powerpc/sysdev/ppc4xx_pci.c +++ b/arch/powerpc/sysdev/ppc4xx_pci.c @@ -204,6 +204,23 @@ static int __init ppc4xx_setup_one_pci_PMM(struct pci_controller *hose, { u32 ma, pcila, pciha; + /* Hack warning ! The "old" PCI 2.x cell only let us configure the low + * 32-bit of incoming PLB addresses. The top 4 bits of the 36-bit + * address are actually hard wired to a value that appears to depend + * on the specific SoC. For example, it's 0 on 440EP and 1 on 440EPx. + * + * The trick here is we just crop those top bits and ignore them when + * programming the chip. That means the device-tree has to be right + * for the specific part used (we don't print a warning if it's wrong + * but on the other hand, you'll crash quickly enough), but at least + * this code should work whatever the hard coded value is + */ + plb_addr &= 0xffffffffull; + + /* Note: Due to the above hack, the test below doesn't actually test + * if you address is above 4G, but it tests that address and + * (address + size) are both contained in the same 4G + */ if ((plb_addr + size) > 0xffffffffull || !is_power_of_2(size) || size < 0x1000 || (plb_addr & (size - 1)) != 0) { printk(KERN_WARNING "%s: Resource out of range\n", |