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authorDan Williams <dan.j.williams@intel.com>2007-05-02 12:59:44 -0400
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-03 09:02:48 -0400
commite90ddd813df7897af34226ed1cd442f7a182816e (patch)
tree1ecf08c0aa9d71d54019fc84876a07898352b641 /include/asm-arm/arch-iop33x
parentfa543f005de175080640266ca536d45b4b0b1a61 (diff)
[ARM] 4348/4: iop3xx: Give Linux control over PCI initialization
Currently the iop3xx platform support code assumes that RedBoot is the bootloader and has already initialized the ATU. Linux should handle this initialization for three reasons: 1/ The memory map that RedBoot sets up is not optimal (page_to_dma and virt_to_phys return different addresses). The effect of this is that using the dma mapping API for the internal bus dma units generates pci bus addresses that are incorrect for the internal bus. 2/ Not all iop platforms use RedBoot 3/ If the ATU is already initialized it indicates that the iop is an add-in card in another host, it does not own the PCI bus, and should not be re-initialized. Changelog: * rather than change nr_controllers to zero, simply do not call pci_common_init Cc: Lennert Buytenhek <kernel@wantstofly.org> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'include/asm-arm/arch-iop33x')
-rw-r--r--include/asm-arm/arch-iop33x/iop33x.h10
-rw-r--r--include/asm-arm/arch-iop33x/memory.h4
2 files changed, 12 insertions, 2 deletions
diff --git a/include/asm-arm/arch-iop33x/iop33x.h b/include/asm-arm/arch-iop33x/iop33x.h
index 7ac6e93db5ff..766985b9a723 100644
--- a/include/asm-arm/arch-iop33x/iop33x.h
+++ b/include/asm-arm/arch-iop33x/iop33x.h
@@ -29,5 +29,15 @@
29#define IOP33X_UART1_PHYS (IOP3XX_PERIPHERAL_PHYS_BASE + 0x1740) 29#define IOP33X_UART1_PHYS (IOP3XX_PERIPHERAL_PHYS_BASE + 0x1740)
30#define IOP33X_UART1_VIRT (IOP3XX_PERIPHERAL_VIRT_BASE + 0x1740) 30#define IOP33X_UART1_VIRT (IOP3XX_PERIPHERAL_VIRT_BASE + 0x1740)
31 31
32/* ATU Parameters
33 * set up a 1:1 bus to physical ram relationship
34 * w/ pci on top of physical ram in memory map
35 */
36#define IOP33X_MAX_RAM_SIZE 0x80000000UL
37#define IOP3XX_MAX_RAM_SIZE IOP33X_MAX_RAM_SIZE
38#define IOP3XX_PCI_LOWER_MEM_BA (PHYS_OFFSET + IOP33X_MAX_RAM_SIZE)
39#define IOP33X_PCI_MEM_WINDOW_SIZE 0x08000000
40#define IOP3XX_PCI_MEM_WINDOW_SIZE IOP33X_PCI_MEM_WINDOW_SIZE
41
32 42
33#endif 43#endif
diff --git a/include/asm-arm/arch-iop33x/memory.h b/include/asm-arm/arch-iop33x/memory.h
index 0d39139b241e..c8749127d6ab 100644
--- a/include/asm-arm/arch-iop33x/memory.h
+++ b/include/asm-arm/arch-iop33x/memory.h
@@ -19,8 +19,8 @@
19 * bus_to_virt: Used to convert an address for DMA operations 19 * bus_to_virt: Used to convert an address for DMA operations
20 * to an address that the kernel can use. 20 * to an address that the kernel can use.
21 */ 21 */
22#define __virt_to_bus(x) (((__virt_to_phys(x)) & ~(*IOP3XX_IATVR2)) | ((*IOP3XX_IABAR2) & 0xfffffff0)) 22#define __virt_to_bus(x) (__virt_to_phys(x))
23#define __bus_to_virt(x) (__phys_to_virt(((x) & ~(*IOP3XX_IALR2)) | ( *IOP3XX_IATVR2))) 23#define __bus_to_virt(x) (__phys_to_virt(x))
24 24
25 25
26#endif 26#endif