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pci: tegra: clip RAM size to 32-bits

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Tegra peripherals can generally access a 32-bit physical address space,
and I believe this applies to PCIe. Clip the PCI region that refers to
DRAM so it fits into 32-bits to avoid issues.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>
This commit is contained in:
Stephen Warren 2015-10-05 17:00:40 -06:00 committed by Tom Warren
parent dfa551e49c
commit bec05246f6
1 changed files with 9 additions and 1 deletions
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10
drivers/pci/pci_tegra.c
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@ -997,6 +997,14 @@ static const struct tegra_pcie_soc tegra124_pcie_soc = {
static int process_nodes(const void *fdt, int nodes[], unsigned int count)
{
unsigned int i;
uint64_t dram_end;
uint32_t pci_dram_size;
/* Clip PCI-accessible DRAM to 32-bits */
dram_end = ((uint64_t)NV_PA_SDRAM_BASE) + gd->ram_size;
if (dram_end > 0x100000000)
dram_end = 0x100000000;
pci_dram_size = dram_end - NV_PA_SDRAM_BASE;
for (i = 0; i < count; i++) {
const struct tegra_pcie_soc *soc;
@ -1069,7 +1077,7 @@ static int process_nodes(const void *fdt, int nodes[], unsigned int count)
pcie->hose.last_busno = 0;
pci_set_region(&pcie->hose.regions[0], NV_PA_SDRAM_BASE,
NV_PA_SDRAM_BASE, gd->ram_size,
NV_PA_SDRAM_BASE, pci_dram_size,
PCI_REGION_MEM | PCI_REGION_SYS_MEMORY);
pci_set_region(&pcie->hose.regions[1], pcie->io.start,