powerpc: Added PCI MSI support using the HSTA module

The PPC476GTR SoC supports message signalled interrupts (MSI) by writing
to special addresses within the High Speed Transfer Assist (HSTA) module.

This patch adds support for PCI MSI with a new system device. The DMA
window is also updated to allow access to the entire 42-bit address range
to allow PCI devices write access to the HSTA module.

Signed-off-by: Alistair Popple <alistair@popple.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 0 insertions, 15 deletions

diff --git a/arch/powerpc/boot/treeboot-akebono.c b/arch/powerpc/boot/treeboot-akebono.c
index 070a20f2f5d1..b73174c34fe4 100644
--- a/arch/powerpc/boot/treeboot-akebono.c
+++ b/arch/powerpc/boot/treeboot-akebono.c
@@ -75,24 +75,9 @@ static void ibm_akebono_fixups(void)
 {
 	void *emac;
 	u32 reg;
-	void *devp = finddevice("/");
-	u32 dma_ranges[7];
 
 	dt_fixup_memory(0x0ULL,  ibm_akebono_memsize);
 
-	while ((devp = find_node_by_devtype(devp, "pci"))) {
-		if (getprop(devp, "dma-ranges", dma_ranges,
-			    sizeof(dma_ranges)) < 0) {
-			printf("%s: Failed to get dma-ranges\r\n", __func__);
-			continue;
-		}
-
-		dma_ranges[5] = ibm_akebono_memsize >> 32;
-		dma_ranges[6] = ibm_akebono_memsize & 0xffffffffUL;
-
-		setprop(devp, "dma-ranges", dma_ranges, sizeof(dma_ranges));
-	}
-
 	/* Fixup the SD timeout frequency */
 	mtdcrx(CCTL0_MCO4, 0x1);