Shifting them up into the vmalloc region prevents the following warning,
when booting a zynq qemu target with more than 512mb of RAM:
BUG: mapping for 0xe0000000 at 0xe0000000 out of vmalloc space
In addition, it allows for reuse of these mappings when the proper
drivers issue requests via ioremap().
Signed-off-by: Josh Cartwright <josh.cartwri...@ni.com>
Cc: John Linn <john.l...@xilinx.com>
Acked-by: Arnd Bergmann <a...@arndb.de>
---
arch/arm/mach-zynq/common.c | 6 +++---
arch/arm/mach-zynq/include/mach/zynq_soc.h | 23 +++++++++++++----------
2 files changed, 16 insertions(+), 13 deletions(-)
diff --git a/arch/arm/mach-zynq/common.c b/arch/arm/mach-zynq/common.c
index ba48f06..ba8d14f 100644
--- a/arch/arm/mach-zynq/common.c
+++ b/arch/arm/mach-zynq/common.c
@@ -73,12 +73,12 @@ static struct map_desc io_desc[] __initdata = {
{
.virtual = TTC0_VIRT,
.pfn = __phys_to_pfn(TTC0_PHYS),
- .length = SZ_4K,
+ .length = TTC0_SIZE,
.type = MT_DEVICE,
}, {
.virtual = SCU_PERIPH_VIRT,
.pfn = __phys_to_pfn(SCU_PERIPH_PHYS),
- .length = SZ_8K,
+ .length = SCU_PERIPH_SIZE,
.type = MT_DEVICE,
},
@@ -86,7 +86,7 @@ static struct map_desc io_desc[] __initdata = {
{
.virtual = UART0_VIRT,
.pfn = __phys_to_pfn(UART0_PHYS),
- .length = SZ_4K,
+ .length = UART0_SIZE,
.type = MT_DEVICE,
},
#endif
diff --git a/arch/arm/mach-zynq/include/mach/zynq_soc.h
b/arch/arm/mach-zynq/include/mach/zynq_soc.h
index 218283a..c6b9b67 100644
--- a/arch/arm/mach-zynq/include/mach/zynq_soc.h
+++ b/arch/arm/mach-zynq/include/mach/zynq_soc.h
@@ -15,27 +15,30 @@
#ifndef __MACH_XILINX_SOC_H__
#define __MACH_XILINX_SOC_H__
+#include <asm/pgtable.h>
+
#define PERIPHERAL_CLOCK_RATE 2500000
-/* For now, all mappings are flat (physical = virtual)
+/* Static peripheral mappings are mapped at the top of the
+ * vmalloc region
*/
-#define UART0_PHYS 0xE0000000
-#define UART0_VIRT UART0_PHYS
+#define UART0_PHYS 0xE0000000
+#define UART0_SIZE SZ_4K
+#define UART0_VIRT (VMALLOC_END - UART0_SIZE)
-#define TTC0_PHYS 0xF8001000
-#define TTC0_VIRT TTC0_PHYS
+#define TTC0_PHYS 0xF8001000
+#define TTC0_SIZE SZ_4K
+#define TTC0_VIRT (UART0_VIRT - TTC0_SIZE)
-#define SCU_PERIPH_PHYS 0xF8F00000
-#define SCU_PERIPH_VIRT SCU_PERIPH_PHYS
+#define SCU_PERIPH_PHYS 0xF8F00000
+#define SCU_PERIPH_SIZE SZ_8K
+#define SCU_PERIPH_VIRT (TTC0_VIRT - SCU_PERIPH_SIZE)
/* The following are intended for the devices that are mapped early */
#define TTC0_BASE IOMEM(TTC0_VIRT)
#define SCU_PERIPH_BASE IOMEM(SCU_PERIPH_VIRT)
-/*
- * Mandatory for CONFIG_LL_DEBUG, UART is mapped virtual = physical
- */
#define LL_UART_PADDR UART0_PHYS
#define LL_UART_VADDR UART0_VIRT
--
1.8.0
--
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