[SeaBIOS] [PATCH v2 1/8] seabios: pci: introduce foreachpci_in_bus() helper macro.
Isaku Yamahata
yamahata at valinux.co.jp
Tue Jun 22 10:57:46 CEST 2010
This patch introduces foreachpci_in_bus() helper macro for
depth first recursion. foreachpci() is for width first recursion.
The macro will be used later to initialize pci bridge
that requires depth first recursion.
Signed-off-by: Isaku Yamahata <yamahata at valinux.co.jp>
---
changes v1 -> v2:
- simplified according to Kevin's suggestion.
---
src/pci.h | 10 ++++++++++
1 files changed, 10 insertions(+), 0 deletions(-)
diff --git a/src/pci.h b/src/pci.h
index 8a21c06..e40e116 100644
--- a/src/pci.h
+++ b/src/pci.h
@@ -21,6 +21,9 @@ static inline u8 pci_bdf_to_fn(u16 bdf) {
static inline u16 pci_to_bdf(int bus, int dev, int fn) {
return (bus<<8) | (dev<<3) | fn;
}
+static inline u16 pci_bus_devfn_to_bdf(int bus, u16 devfn) {
+ return (bus << 8) | devfn;
+}
static inline u32 pci_vd(u16 vendor, u16 device) {
return (device << 16) | vendor;
@@ -50,6 +53,13 @@ int pci_next(int bdf, int *pmax);
; BDF >= 0 \
; BDF=pci_next(BDF+1, &MAX))
+#define foreachpci_in_bus(BDF, MAX, BUS) \
+ for (MAX = pci_bus_devfn_to_bdf(BUS, 0) + 0x0100, \
+ BDF = pci_next(pci_bus_devfn_to_bdf(BUS, 0), &MAX) \
+ ; BDF >= 0 && BDF < pci_bus_devfn_to_bdf(BUS, 0) + 0x0100 \
+ ; MAX = pci_bus_devfn_to_bdf(BUS, 0) + 0x0100, \
+ BDF = pci_next(BDF + 1, &MAX))
+
// pirtable.c
void create_pirtable(void);
--
1.6.6.1
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