[Xen-devel] [PATCH RFC] DRA7: Add specific mappings for devices/regions not in the device tree.

[Brandon Perez <bperez-1@xxxxxx>]

The DRA7 chip, which is similar to the OMAP5 chip, also requires specific
mappings. These are MMIO mappings which are not explicitly stated in the device
tree, so Xen does not know to map them. This patch adds these regions required
by the DRA7 to be mapped.

Signed-off-by: Brandon Perez <bperez-1@xxxxxx>
---
 xen/arch/arm/platforms/omap5.c        |   27 +++++++++++++++++++++++++++
 xen/include/asm-arm/platforms/omap5.h |    3 +++
 2 files changed, 30 insertions(+)

diff --git a/xen/arch/arm/platforms/omap5.c b/xen/arch/arm/platforms/omap5.c
index e7bf30d..3c6495a 100644
--- a/xen/arch/arm/platforms/omap5.c
+++ b/xen/arch/arm/platforms/omap5.c
@@ -120,6 +120,32 @@ static int omap5_specific_mapping(struct domain *d)
     return 0;
 }

+/* Additional mappings for dom0 (not in the DTS) */
+static int dra7_specific_mapping(struct domain *d)
+{
+    /* Map the PRM module */
+    map_mmio_regions(d, paddr_to_pfn(OMAP5_PRM_BASE), 2,
+                     paddr_to_pfn(OMAP5_PRM_BASE));
+
+    /* Map the PRM_MPU */
+    map_mmio_regions(d, paddr_to_pfn(OMAP5_PRCM_MPU_BASE), 1,
+                     paddr_to_pfn(OMAP5_PRCM_MPU_BASE));
+
+    /* Map the Wakeup Gen */
+    map_mmio_regions(d, paddr_to_pfn(OMAP5_WKUPGEN_BASE), 1,
+                     paddr_to_pfn(OMAP5_WKUPGEN_BASE));
+
+    /* Map the on-chip SRAM */
+    map_mmio_regions(d, paddr_to_pfn(OMAP5_SRAM_PA), 32,
+                     paddr_to_pfn(OMAP5_SRAM_PA));
+
+    /* Map GPMC address space for NAND flash. */
+    map_mmio_regions(d, paddr_to_pfn(OMAP5_GPMC_PA), 65536,
+                     paddr_to_pfn(OMAP5_GPMC_PA));
+
+    return 0;
+}
+
 static int __init omap5_smp_init(void)
 {
     void __iomem *wugen_base;
@@ -171,6 +197,7 @@ PLATFORM_START(dra7, "TI DRA7")
     .init_time = omap5_init_time,
     .cpu_up = cpu_up_send_sgi,
     .smp_init = omap5_smp_init,
+    .specific_mapping = dra7_specific_mapping,

     .dom0_gnttab_start = 0x4b000000,
     .dom0_gnttab_size = 0x20000,
diff --git a/xen/include/asm-arm/platforms/omap5.h 
b/xen/include/asm-arm/platforms/omap5.h
index c559c84..d87e7d2 100644
--- a/xen/include/asm-arm/platforms/omap5.h
+++ b/xen/include/asm-arm/platforms/omap5.h
@@ -20,6 +20,9 @@
 #define OMAP_AUX_CORE_BOOT_0_OFFSET             0x800
 #define OMAP_AUX_CORE_BOOT_1_OFFSET             0x804

+#define OMAP5_GPMC_PA                           0x01000000
+#define OMAP5_TILER_PA                          0x60000000
+
 #endif /* __ASM_ARM_PLATFORMS_OMAP5_H */

 /*
--
1.7.9.5


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