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authorDan Williams <dan.j.williams@intel.com>2007-05-02 17:59:44 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2007-05-03 14:02:48 +0100
commite90ddd813df7897af34226ed1cd442f7a182816e (patch)
tree1ecf08c0aa9d71d54019fc84876a07898352b641 /include/asm-arm/arch-iop32x
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-iop32x')
-rw-r--r--include/asm-arm/arch-iop32x/iop32x.h9
-rw-r--r--include/asm-arm/arch-iop32x/memory.h4
2 files changed, 11 insertions, 2 deletions
diff --git a/include/asm-arm/arch-iop32x/iop32x.h b/include/asm-arm/arch-iop32x/iop32x.h
index 2e9469047eb..0d8af57221a 100644
--- a/include/asm-arm/arch-iop32x/iop32x.h
+++ b/include/asm-arm/arch-iop32x/iop32x.h
@@ -24,5 +24,14 @@
#include <asm/hardware/iop3xx.h>
+/* ATU Parameters
+ * set up a 1:1 bus to physical ram relationship
+ * w/ physical ram on top of pci in the memory map
+ */
+#define IOP32X_MAX_RAM_SIZE 0x40000000UL
+#define IOP3XX_MAX_RAM_SIZE IOP32X_MAX_RAM_SIZE
+#define IOP3XX_PCI_LOWER_MEM_BA 0x80000000
+#define IOP32X_PCI_MEM_WINDOW_SIZE 0x04000000
+#define IOP3XX_PCI_MEM_WINDOW_SIZE IOP32X_PCI_MEM_WINDOW_SIZE
#endif
diff --git a/include/asm-arm/arch-iop32x/memory.h b/include/asm-arm/arch-iop32x/memory.h
index 764cd3f0d41..c51072af214 100644
--- a/include/asm-arm/arch-iop32x/memory.h
+++ b/include/asm-arm/arch-iop32x/memory.h
@@ -19,8 +19,8 @@
* bus_to_virt: Used to convert an address for DMA operations
* to an address that the kernel can use.
*/
-#define __virt_to_bus(x) (((__virt_to_phys(x)) & ~(*IOP3XX_IATVR2)) | ((*IOP3XX_IABAR2) & 0xfffffff0))
-#define __bus_to_virt(x) (__phys_to_virt(((x) & ~(*IOP3XX_IALR2)) | ( *IOP3XX_IATVR2)))
+#define __virt_to_bus(x) (__virt_to_phys(x))
+#define __bus_to_virt(x) (__phys_to_virt(x))
#endif