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[PARISC] Make PCI_HOST_ADDR and PCI_BUS_ADDR symmetrical

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Change to asm-parisc/pci.h makes the define of PCI_HOST_ADDR symmetrical
with PCI_BUS_ADDR. Also add a comment about PA_VIEW and LMMIO/ELMMIO/GMMIO.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
This commit is contained in:
Grant Grundler 2006-01-10 20:48:00 -05:00 committed by Kyle McMartin
parent 7c0b67efe9
commit 9b9ff2e16a
1 changed files with 7 additions and 1 deletions
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8
include/asm-parisc/pci.h
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@ -84,11 +84,17 @@ static __inline__ int pci_is_lmmio(struct pci_hba_data *hba, unsigned long a)
/*
** Convert between PCI (IO_VIEW) addresses and processor (PA_VIEW) addresses.
** See pcibios.c for more conversions used by Generic PCI code.
**
** Platform characteristics/firmware guarantee that
** (1) PA_VIEW - IO_VIEW = lmmio_offset for both LMMIO and ELMMIO
** (2) PA_VIEW == IO_VIEW for GMMIO
*/
#define PCI_BUS_ADDR(hba,a) (PCI_IS_LMMIO(hba,a) \
? ((a) - hba->lmmio_space_offset) /* mangle LMMIO */ \
: (a)) /* GMMIO */
#define PCI_HOST_ADDR(hba,a) ((a) + hba->lmmio_space_offset)
#define PCI_HOST_ADDR(hba,a) (((a) & PCI_F_EXTEND) == 0 \
? (a) + hba->lmmio_space_offset \
: (a))
#else /* !CONFIG_64BIT */