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Diffstat (limited to 'cpu/ppc4xx/4xx_pcie.c')
-rw-r--r--cpu/ppc4xx/4xx_pcie.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/cpu/ppc4xx/4xx_pcie.c b/cpu/ppc4xx/4xx_pcie.c
index 7ee0e5b..9ab3588 100644
--- a/cpu/ppc4xx/4xx_pcie.c
+++ b/cpu/ppc4xx/4xx_pcie.c
@@ -46,6 +46,20 @@ enum {
LNKW_X8 = 0x8
};
+static int validate_endpoint(struct pci_controller *hose)
+{
+ if (hose->cfg_data == (u8 *)CFG_PCIE0_CFGBASE)
+ return (is_end_point(0));
+ else if (hose->cfg_data == (u8 *)CFG_PCIE1_CFGBASE)
+ return (is_end_point(1));
+#if CFG_PCIE_NR_PORTS > 2
+ else if (hose->cfg_data == (u8 *)CFG_PCIE2_CFGBASE)
+ return (is_end_point(2));
+#endif
+
+ return 0;
+}
+
static u8* pcie_get_base(struct pci_controller *hose, unsigned int devfn)
{
u8 *base = (u8*)hose->cfg_data;
@@ -95,6 +109,9 @@ static int pcie_read_config(struct pci_controller *hose, unsigned int devfn,
u8 *address;
*val = 0;
+ if (validate_endpoint(hose))
+ return 0; /* No upstream config access */
+
/*
* Bus numbers are relative to hose->first_busno
*/
@@ -150,6 +167,9 @@ static int pcie_write_config(struct pci_controller *hose, unsigned int devfn,
u8 *address;
+ if (validate_endpoint(hose))
+ return 0; /* No upstream config access */
+
/*
* Bus numbers are relative to hose->first_busno
*/
@@ -595,9 +615,9 @@ int ppc4xx_init_pcie_port(int port, int rootport)
u32 low, high;
if (!core_init) {
- ++core_init;
if (ppc4xx_init_pcie())
return -1;
+ ++core_init;
}
/*