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ARM: footbridge: use fixed PCI i/o mapping 

Move footbridge PCI to fixed i/o mapping. io.h is still needed for the
!MMU case.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Cc: Russell King <linux@arm.linux.org.uk>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Rob Herring 2012-03-01 20:48:12 -06:00
parent c04dc9a6bf
commit 8ef6e6201b
5 changed files with 14 additions and 31 deletions
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2
arch/arm/Kconfig
View File

@ -431,7 +431,7 @@ config ARCH_FOOTBRIDGE
select FOOTBRIDGE
select GENERIC_CLOCKEVENTS
select HAVE_IDE
select NEED_MACH_IO_H
select NEED_MACH_IO_H if !MMU
select NEED_MACH_MEMORY_H
help
Support for systems based on the DC21285 companion chip

12
arch/arm/mach-footbridge/common.c
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@ -15,7 +15,7 @@
#include <linux/init.h>
#include <linux/io.h>
#include <linux/spinlock.h>
#include <asm/pgtable.h>
#include <asm/page.h>
#include <asm/irq.h>
@ -26,6 +26,7 @@
#include <asm/mach/irq.h>
#include <asm/mach/map.h>
#include <asm/mach/pci.h>
#include "common.h"
@ -175,11 +176,6 @@ static struct map_desc ebsa285_host_io_desc[] __initdata = {
.pfn = __phys_to_pfn(DC21285_PCI_IACK),
.length = PCIIACK_SIZE,
.type = MT_DEVICE,
}, {
.virtual = PCIO_BASE,
.pfn = __phys_to_pfn(DC21285_PCI_IO),
.length = PCIO_SIZE,
.type = MT_DEVICE,
},
#endif
};
@ -196,8 +192,10 @@ void __init footbridge_map_io(void)
* Now, work out what we've got to map in addition on this
* platform.
*/
if (footbridge_cfn_mode())
if (footbridge_cfn_mode()) {
iotable_init(ebsa285_host_io_desc, ARRAY_SIZE(ebsa285_host_io_desc));
pci_map_io_early(__phys_to_pfn(DC21285_PCI_IO));
}
}
void footbridge_restart(char mode, const char *cmd)

16
arch/arm/mach-footbridge/dc21285.c
View File

@ -276,8 +276,8 @@ int __init dc21285_setup(int nr, struct pci_sys_data *sys)
sys->mem_offset = DC21285_PCI_MEM;
pci_add_resource_offset(&sys->resources,
&ioport_resource, sys->io_offset);
pci_ioremap_io(0, DC21285_PCI_IO);
pci_add_resource_offset(&sys->resources, &res[0], sys->mem_offset);
pci_add_resource_offset(&sys->resources, &res[1], sys->mem_offset);
@ -298,7 +298,7 @@ void __init dc21285_preinit(void)
mem_size = (unsigned int)high_memory - PAGE_OFFSET;
for (mem_mask = 0x00100000; mem_mask < 0x10000000; mem_mask <<= 1)
if (mem_mask >= mem_size)
break;
break;
/*
* These registers need to be set up whether we're the
@ -350,14 +350,6 @@ void __init dc21285_preinit(void)
"PCI data parity", NULL);
if (cfn_mode) {
static struct resource csrio;
csrio.flags = IORESOURCE_IO;
csrio.name = "Footbridge";
allocate_resource(&ioport_resource, &csrio, 128,
0xff00, 0xffff, 128, NULL, NULL);
/*
* Map our SDRAM at a known address in PCI space, just in case
* the firmware had other ideas. Using a nonzero base is
@ -365,7 +357,7 @@ void __init dc21285_preinit(void)
* in the range 0x000a0000 to 0x000c0000. (eg, S3 cards).
*/
*CSR_PCICSRBASE = 0xf4000000;
*CSR_PCICSRIOBASE = csrio.start;
*CSR_PCICSRIOBASE = 0;
*CSR_PCISDRAMBASE = __virt_to_bus(PAGE_OFFSET);
*CSR_PCIROMBASE = 0;
*CSR_PCICMD = PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER |

3
arch/arm/mach-footbridge/include/mach/debug-macro.S
View File

@ -17,7 +17,8 @@
/* For NetWinder debugging */
.macro addruart, rp, rv, tmp
mov \rp, #0x000003f8
orr \rv, \rp, #0xff000000 @ virtual
orr \rv, \rp, #0xfe000000 @ virtual
orr \rv, \rv, #0x00e00000 @ virtual
orr \rp, \rp, #0x7c000000 @ physical
.endm

12
arch/arm/mach-footbridge/include/mach/io.h
View File

@ -14,18 +14,10 @@
#ifndef __ASM_ARM_ARCH_IO_H
#define __ASM_ARM_ARCH_IO_H
#ifdef CONFIG_MMU
#define MMU_IO(a, b) (a)
#else
#define MMU_IO(a, b) (b)
#endif
#define PCIO_SIZE 0x00100000
#define PCIO_BASE MMU_IO(0xff000000, 0x7c000000)
/*
* Translation of various region addresses to virtual addresses
* Translation of various i/o addresses to host addresses for !CONFIG_MMU
*/
#define PCIO_BASE 0x7c000000
#define __io(a) ((void __iomem *)(PCIO_BASE + (a)))
#endif