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-rw-r--r--arch/mips/mips-boards/generic/pci.c167
1 files changed, 126 insertions, 41 deletions
diff --git a/arch/mips/mips-boards/generic/pci.c b/arch/mips/mips-boards/generic/pci.c
index 92c34bda02ae..1f6f9df74ab2 100644
--- a/arch/mips/mips-boards/generic/pci.c
+++ b/arch/mips/mips-boards/generic/pci.c
@@ -1,6 +1,8 @@
/*
- * Carsten Langgaard, carstenl@mips.com
- * Copyright (C) 1999, 2000 MIPS Technologies, Inc. All rights reserved.
+ * Copyright (C) 1999, 2000, 2004, 2005 MIPS Technologies, Inc.
+ * All rights reserved.
+ * Authors: Carsten Langgaard <carstenl@mips.com>
+ * Maciej W. Rozycki <macro@mips.com>
*
* Copyright (C) 2004 by Ralf Baechle (ralf@linux-mips.org)
*
@@ -19,65 +21,46 @@
*
* MIPS boards specific PCI support.
*/
-#include <linux/config.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/kernel.h>
#include <linux/init.h>
-#include <asm/mips-boards/generic.h>
#include <asm/gt64120.h>
+
+#include <asm/mips-boards/generic.h>
#include <asm/mips-boards/bonito64.h>
#include <asm/mips-boards/msc01_pci.h>
-#ifdef CONFIG_MIPS_MALTA
-#include <asm/mips-boards/malta.h>
-#endif
static struct resource bonito64_mem_resource = {
.name = "Bonito PCI MEM",
- .start = 0x10000000UL,
- .end = 0x1bffffffUL,
.flags = IORESOURCE_MEM,
};
static struct resource bonito64_io_resource = {
- .name = "Bonito IO MEM",
- .start = 0x00002000UL, /* avoid conflicts with YAMON allocated I/O addresses */
+ .name = "Bonito PCI I/O",
+ .start = 0x00000000UL,
.end = 0x000fffffUL,
.flags = IORESOURCE_IO,
};
static struct resource gt64120_mem_resource = {
- .name = "GT64120 PCI MEM",
- .start = 0x10000000UL,
- .end = 0x1bdfffffUL,
+ .name = "GT-64120 PCI MEM",
.flags = IORESOURCE_MEM,
};
static struct resource gt64120_io_resource = {
- .name = "GT64120 IO MEM",
-#ifdef CONFIG_MIPS_ATLAS
- .start = 0x18000000UL,
- .end = 0x181fffffUL,
-#endif
-#ifdef CONFIG_MIPS_MALTA
- .start = 0x00002000UL,
- .end = 0x001fffffUL,
-#endif
+ .name = "GT-64120 PCI I/O",
.flags = IORESOURCE_IO,
};
static struct resource msc_mem_resource = {
.name = "MSC PCI MEM",
- .start = 0x10000000UL,
- .end = 0x1fffffffUL,
.flags = IORESOURCE_MEM,
};
static struct resource msc_io_resource = {
- .name = "MSC IO MEM",
- .start = 0x00002000UL,
- .end = 0x007fffffUL,
+ .name = "MSC PCI I/O",
.flags = IORESOURCE_IO,
};
@@ -89,7 +72,6 @@ static struct pci_controller bonito64_controller = {
.pci_ops = &bonito64_pci_ops,
.io_resource = &bonito64_io_resource,
.mem_resource = &bonito64_mem_resource,
- .mem_offset = 0x10000000UL,
.io_offset = 0x00000000UL,
};
@@ -97,21 +79,18 @@ static struct pci_controller gt64120_controller = {
.pci_ops = &gt64120_pci_ops,
.io_resource = &gt64120_io_resource,
.mem_resource = &gt64120_mem_resource,
- .mem_offset = 0x00000000UL,
- .io_offset = 0x00000000UL,
};
-static struct pci_controller msc_controller = {
+static struct pci_controller msc_controller = {
.pci_ops = &msc_pci_ops,
.io_resource = &msc_io_resource,
.mem_resource = &msc_mem_resource,
- .mem_offset = 0x10000000UL,
- .io_offset = 0x00000000UL,
};
-static int __init pcibios_init(void)
+void __init mips_pcibios_init(void)
{
struct pci_controller *controller;
+ unsigned long start, end, map, start1, end1, map1, map2, map3, mask;
switch (mips_revision_corid) {
case MIPS_REVISION_CORID_QED_RM5261:
@@ -130,34 +109,140 @@ static int __init pcibios_init(void)
(0 << GT_PCI0_CFGADDR_DEVNUM_SHF) | /* GT64120 dev */
(0 << GT_PCI0_CFGADDR_FUNCTNUM_SHF) | /* Function 0*/
((0x20/4) << GT_PCI0_CFGADDR_REGNUM_SHF) | /* BAR 4*/
- GT_PCI0_CFGADDR_CONFIGEN_BIT );
+ GT_PCI0_CFGADDR_CONFIGEN_BIT);
/* Perform the write */
GT_WRITE(GT_PCI0_CFGDATA_OFS, CPHYSADDR(MIPS_GT_BASE));
+ /* Set up resource ranges from the controller's registers. */
+ start = GT_READ(GT_PCI0M0LD_OFS);
+ end = GT_READ(GT_PCI0M0HD_OFS);
+ map = GT_READ(GT_PCI0M0REMAP_OFS);
+ end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
+ start1 = GT_READ(GT_PCI0M1LD_OFS);
+ end1 = GT_READ(GT_PCI0M1HD_OFS);
+ map1 = GT_READ(GT_PCI0M1REMAP_OFS);
+ end1 = (end1 & GT_PCI_HD_MSK) | (start1 & ~GT_PCI_HD_MSK);
+ /* Cannot support multiple windows, use the wider. */
+ if (end1 - start1 > end - start) {
+ start = start1;
+ end = end1;
+ map = map1;
+ }
+ mask = ~(start ^ end);
+ /* We don't support remapping with a discontiguous mask. */
+ BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
+ mask != ~((mask & -mask) - 1));
+ gt64120_mem_resource.start = start;
+ gt64120_mem_resource.end = end;
+ gt64120_controller.mem_offset = (start & mask) - (map & mask);
+ /* Addresses are 36-bit, so do shifts in the destinations. */
+ gt64120_mem_resource.start <<= GT_PCI_DCRM_SHF;
+ gt64120_mem_resource.end <<= GT_PCI_DCRM_SHF;
+ gt64120_mem_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
+ gt64120_controller.mem_offset <<= GT_PCI_DCRM_SHF;
+
+ start = GT_READ(GT_PCI0IOLD_OFS);
+ end = GT_READ(GT_PCI0IOHD_OFS);
+ map = GT_READ(GT_PCI0IOREMAP_OFS);
+ end = (end & GT_PCI_HD_MSK) | (start & ~GT_PCI_HD_MSK);
+ mask = ~(start ^ end);
+ /* We don't support remapping with a discontiguous mask. */
+ BUG_ON((start & GT_PCI_HD_MSK) != (map & GT_PCI_HD_MSK) &&
+ mask != ~((mask & -mask) - 1));
+ gt64120_io_resource.start = map & mask;
+ gt64120_io_resource.end = (map & mask) | ~mask;
+ gt64120_controller.io_offset = 0;
+ /* Addresses are 36-bit, so do shifts in the destinations. */
+ gt64120_io_resource.start <<= GT_PCI_DCRM_SHF;
+ gt64120_io_resource.end <<= GT_PCI_DCRM_SHF;
+ gt64120_io_resource.end |= (1 << GT_PCI_DCRM_SHF) - 1;
+
controller = &gt64120_controller;
break;
case MIPS_REVISION_CORID_BONITO64:
case MIPS_REVISION_CORID_CORE_20K:
case MIPS_REVISION_CORID_CORE_EMUL_BON:
+ /* Set up resource ranges from the controller's registers. */
+ map = BONITO_PCIMAP;
+ map1 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO0) >>
+ BONITO_PCIMAP_PCIMAP_LO0_SHIFT;
+ map2 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO1) >>
+ BONITO_PCIMAP_PCIMAP_LO1_SHIFT;
+ map3 = (BONITO_PCIMAP & BONITO_PCIMAP_PCIMAP_LO2) >>
+ BONITO_PCIMAP_PCIMAP_LO2_SHIFT;
+ /* Combine as many adjacent windows as possible. */
+ map = map1;
+ start = BONITO_PCILO0_BASE;
+ end = 1;
+ if (map3 == map2 + 1) {
+ map = map2;
+ start = BONITO_PCILO1_BASE;
+ end++;
+ }
+ if (map2 == map1 + 1) {
+ map = map1;
+ start = BONITO_PCILO0_BASE;
+ end++;
+ }
+ bonito64_mem_resource.start = start;
+ bonito64_mem_resource.end = start +
+ BONITO_PCIMAP_WINBASE(end) - 1;
+ bonito64_controller.mem_offset = start -
+ BONITO_PCIMAP_WINBASE(map);
+
controller = &bonito64_controller;
break;
case MIPS_REVISION_CORID_CORE_MSC:
case MIPS_REVISION_CORID_CORE_FPGA2:
+ case MIPS_REVISION_CORID_CORE_FPGA3:
case MIPS_REVISION_CORID_CORE_EMUL_MSC:
+ /* Set up resource ranges from the controller's registers. */
+ MSC_READ(MSC01_PCI_SC2PMBASL, start);
+ MSC_READ(MSC01_PCI_SC2PMMSKL, mask);
+ MSC_READ(MSC01_PCI_SC2PMMAPL, map);
+ msc_mem_resource.start = start & mask;
+ msc_mem_resource.end = (start & mask) | ~mask;
+ msc_controller.mem_offset = (start & mask) - (map & mask);
+
+ MSC_READ(MSC01_PCI_SC2PIOBASL, start);
+ MSC_READ(MSC01_PCI_SC2PIOMSKL, mask);
+ MSC_READ(MSC01_PCI_SC2PIOMAPL, map);
+ msc_io_resource.start = map & mask;
+ msc_io_resource.end = (map & mask) | ~mask;
+ msc_controller.io_offset = 0;
+ ioport_resource.end = ~mask;
+
+ /* If ranges overlap I/O takes precedence. */
+ start = start & mask;
+ end = start | ~mask;
+ if ((start >= msc_mem_resource.start &&
+ start <= msc_mem_resource.end) ||
+ (end >= msc_mem_resource.start &&
+ end <= msc_mem_resource.end)) {
+ /* Use the larger space. */
+ start = max(start, msc_mem_resource.start);
+ end = min(end, msc_mem_resource.end);
+ if (start - msc_mem_resource.start >=
+ msc_mem_resource.end - end)
+ msc_mem_resource.end = start - 1;
+ else
+ msc_mem_resource.start = end + 1;
+ }
+
controller = &msc_controller;
break;
default:
- return 1;
+ return;
}
+ if (controller->io_resource->start < 0x00001000UL) /* FIXME */
+ controller->io_resource->start = 0x00001000UL;
+
+ iomem_resource.end &= 0xfffffffffULL; /* 64 GB */
ioport_resource.end = controller->io_resource->end;
register_pci_controller (controller);
-
- return 0;
}
-
-early_initcall(pcibios_init);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.