[OpenBIOS] [PATCH] pci: add PCI bridge support for 32-bit PCI IO address spaces
Mark Cave-Ayland
mark.cave-ayland at ilande.co.uk
Fri Sep 22 16:00:13 CEST 2017
Make sure that we set the upper 16-bits of the IO address for both the
PCI IO base and PCI IO limit registers.
Signed-off-by: Mark Cave-Ayland <mark.cave-ayland at ilande.co.uk>
---
drivers/pci.c | 3 +++
drivers/pci.h | 2 ++
2 files changed, 5 insertions(+)
diff --git a/drivers/pci.c b/drivers/pci.c
index 265ab0c..672dcd0 100644
--- a/drivers/pci.c
+++ b/drivers/pci.c
@@ -1494,6 +1494,7 @@ static void ob_configure_pci_bridge(pci_addr addr,
/* Set the base limit registers */
pci_config_write16(addr, PCI_MEMORY_BASE, ((*mem_base >> 16) & ~(0xf)));
+ pci_config_write16(addr, PCI_IO_BASE_UPPER, (*io_base >> 16));
pci_config_write8(addr, PCI_IO_BASE, ((*io_base >> 8) & ~(0xf)));
/* Always ensure legacy ioports are accessible during enumeration.
@@ -1501,6 +1502,7 @@ static void ob_configure_pci_bridge(pci_addr addr,
the configuration process, so we allow them during the secondary
bus scan and then set the correct IO limit below. */
io_scan_limit = *io_base + (0xffff - *io_base);
+ pci_config_write16(addr, PCI_IO_LIMIT_UPPER, (io_scan_limit >> 16));
pci_config_write8(addr, PCI_IO_LIMIT, (io_scan_limit >> 8) & ~(0xf));
/* make pci bridge parent device, prepare for recursion */
@@ -1535,6 +1537,7 @@ static void ob_configure_pci_bridge(pci_addr addr,
/* Set the limit registers */
pci_config_write16(addr, PCI_MEMORY_LIMIT, (((*mem_base - 1) >> 16) & ~(0xf)));
+ pci_config_write16(addr, PCI_IO_LIMIT_UPPER, ((*io_base - 1) >> 16));
pci_config_write8(addr, PCI_IO_LIMIT, (((*io_base - 1) >> 8) & ~(0xf)));
/* Disable unused address spaces */
diff --git a/drivers/pci.h b/drivers/pci.h
index ea70e8a..883a531 100644
--- a/drivers/pci.h
+++ b/drivers/pci.h
@@ -47,7 +47,9 @@
#define PCI_BASE_ADDR_5 0x24
#define PCI_IO_BASE 0x1c
+#define PCI_IO_BASE_UPPER 0x30
#define PCI_IO_LIMIT 0x1d
+#define PCI_IO_LIMIT_UPPER 0x32
#define PCI_MEMORY_BASE 0x20
#define PCI_MEMORY_LIMIT 0x22
--
1.7.10.4
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