rpi4: add a mapping for the PCIe XHCI controller MMIO registers (ARM 64bit)

Create a non-cacheable mapping for the 0x600000000 physical memory region,
where MMIO registers for the PCIe XHCI controller are instantiated by the
PCIe bridge.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Signed-off-by: Matthias Brugger <mbrugger@suse.com>

diff --git a/arch/arm/mach-bcm283x/init.c b/arch/arm/mach-bcm283x/init.c
index f9a5209..cf4c5b2 100644 (file)
--- a/arch/arm/mach-bcm283x/init.c
+++ b/arch/arm/mach-bcm283x/init.c
@@ -12,10 +12,15 @@
 #include <dm/device.h>
 #include <fdt_support.h>
 
+#define BCM2711_RPI4_PCIE_XHCI_MMIO_PHYS       0x600000000UL
+#define BCM2711_RPI4_PCIE_XHCI_MMIO_SIZE       0x800000UL
+
 #ifdef CONFIG_ARM64
 #include <asm/armv8/mmu.h>
 
-static struct mm_region bcm283x_mem_map[] = {
+#define MEM_MAP_MAX_ENTRIES (4)
+
+static struct mm_region bcm283x_mem_map[MEM_MAP_MAX_ENTRIES] = {
        {
                .virt = 0x00000000UL,
                .phys = 0x00000000UL,
@@ -35,7 +40,7 @@ static struct mm_region bcm283x_mem_map[] = {
        }
 };
 
-static struct mm_region bcm2711_mem_map[] = {
+static struct mm_region bcm2711_mem_map[MEM_MAP_MAX_ENTRIES] = {
        {
                .virt = 0x00000000UL,
                .phys = 0x00000000UL,
@@ -50,6 +55,13 @@ static struct mm_region bcm2711_mem_map[] = {
                         PTE_BLOCK_NON_SHARE |
                         PTE_BLOCK_PXN | PTE_BLOCK_UXN
        }, {
+               .virt = BCM2711_RPI4_PCIE_XHCI_MMIO_PHYS,
+               .phys = BCM2711_RPI4_PCIE_XHCI_MMIO_PHYS,
+               .size = BCM2711_RPI4_PCIE_XHCI_MMIO_SIZE,
+               .attrs = PTE_BLOCK_MEMTYPE(MT_DEVICE_NGNRNE) |
+                        PTE_BLOCK_NON_SHARE |
+                        PTE_BLOCK_PXN | PTE_BLOCK_UXN
+       }, {
                /* List terminator */
                0,
        }
@@ -72,7 +84,7 @@ static void _rpi_update_mem_map(struct mm_region *pd)
 {
        int i;
 
-       for (i = 0; i < 2; i++) {
+       for (i = 0; i < MEM_MAP_MAX_ENTRIES; i++) {
                mem_map[i].virt = pd[i].virt;
                mem_map[i].phys = pd[i].phys;
                mem_map[i].size = pd[i].size;