Hexagon: add support for ARCH_PFN_OFFSET

Add support for loading the kernel at a physical offset.  The
offset should still be 4M aligned.

Signed-off-by: Richard Kuo <rkuo@codeaurora.org>

3 files changed, 42 insertions, 31 deletions

diff --git a/arch/hexagon/include/asm/hexagon_vm.h b/arch/hexagon/include/asm/hexagon_vm.h
index c144bee6cabe..6b81e4d5ecb1 100644
--- a/arch/hexagon/include/asm/hexagon_vm.h
+++ b/arch/hexagon/include/asm/hexagon_vm.h
@@ -31,10 +31,26 @@
  * for tracing/debugging.
  */
 
-/*
- * Lets make this stuff visible only if configured,
- * so we can unconditionally include the file.
- */
+#define HVM_TRAP1_VMVERSION             0
+#define HVM_TRAP1_VMRTE                 1
+#define HVM_TRAP1_VMSETVEC              2
+#define HVM_TRAP1_VMSETIE               3
+#define HVM_TRAP1_VMGETIE               4
+#define HVM_TRAP1_VMINTOP               5
+#define HVM_TRAP1_VMCLRMAP              10
+#define HVM_TRAP1_VMNEWMAP              11
+#define HVM_TRAP1_FORMERLY_VMWIRE       12
+#define HVM_TRAP1_VMCACHE               13
+#define HVM_TRAP1_VMGETTIME             14
+#define HVM_TRAP1_VMSETTIME             15
+#define HVM_TRAP1_VMWAIT                16
+#define HVM_TRAP1_VMYIELD               17
+#define HVM_TRAP1_VMSTART               18
+#define HVM_TRAP1_VMSTOP                19
+#define HVM_TRAP1_VMVPID                20
+#define HVM_TRAP1_VMSETREGS             21
+#define HVM_TRAP1_VMGETREGS             22
+#define HVM_TRAP1_VMTIMEROP             24
 
 #ifndef __ASSEMBLY__
 
@@ -175,25 +191,6 @@ static inline long __vmintop_clear(long i)
 
 #else /* Only assembly code should reference these */
 
-#define HVM_TRAP1_VMRTE                 1
-#define HVM_TRAP1_VMSETVEC              2
-#define HVM_TRAP1_VMSETIE               3
-#define HVM_TRAP1_VMGETIE               4
-#define HVM_TRAP1_VMINTOP               5
-#define HVM_TRAP1_VMCLRMAP              10
-#define HVM_TRAP1_VMNEWMAP              11
-#define HVM_TRAP1_FORMERLY_VMWIRE       12
-#define HVM_TRAP1_VMCACHE               13
-#define HVM_TRAP1_VMGETTIME             14
-#define HVM_TRAP1_VMSETTIME             15
-#define HVM_TRAP1_VMWAIT                16
-#define HVM_TRAP1_VMYIELD               17
-#define HVM_TRAP1_VMSTART               18
-#define HVM_TRAP1_VMSTOP                19
-#define HVM_TRAP1_VMVPID                20
-#define HVM_TRAP1_VMSETREGS             21
-#define HVM_TRAP1_VMGETREGS             22
-
 #endif /* __ASSEMBLY__ */
 
 /*
@@ -224,6 +221,8 @@ static inline long __vmintop_clear(long i)
 #define HVM_VMEST_UM_MSK        1
 #define HVM_VMEST_IE_SFT        30
 #define HVM_VMEST_IE_MSK        1
+#define HVM_VMEST_SS_SFT        29
+#define HVM_VMEST_SS_MSK        1
 #define HVM_VMEST_EVENTNUM_SFT  16
 #define HVM_VMEST_EVENTNUM_MSK  0xff
 #define HVM_VMEST_CAUSE_SFT     0
@@ -260,6 +259,8 @@ static inline long __vmintop_clear(long i)
 #define HVM_GE_C_INVI   0x15
 #define HVM_GE_C_PRIVI  0x1B
 #define HVM_GE_C_XMAL   0x1C
+#define HVM_GE_C_WREG   0x1D
+#define HVM_GE_C_PCAL   0x1E
 #define HVM_GE_C_RMAL   0x20
 #define HVM_GE_C_WMAL   0x21
 #define HVM_GE_C_RPROT  0x22
diff --git a/arch/hexagon/include/asm/mem-layout.h b/arch/hexagon/include/asm/mem-layout.h
index af16e977c55e..1426cd71a1d3 100644
--- a/arch/hexagon/include/asm/mem-layout.h
+++ b/arch/hexagon/include/asm/mem-layout.h
@@ -32,16 +32,25 @@
 #define PAGE_OFFSET                     _AC(0xc0000000, UL)
 
 /*
- * LOAD_ADDRESS is the physical/linear address of where in memory
- * the kernel gets loaded. The 12 least significant bits must be zero (0)
- * due to limitations on setting the EVB
- *
+ * Compiling for a platform that needs a crazy physical offset
+ * (like if the memory starts at 1GB and up) means we need
+ * an actual PHYS_OFFSET.  Should be set up in head.S.
  */
 
-#ifndef LOAD_ADDRESS
-#define LOAD_ADDRESS                    0x00000000
+#ifdef CONFIG_HEXAGON_PHYS_OFFSET
+#ifndef __ASSEMBLY__
+extern unsigned long    __phys_offset;
+#endif
+#define PHYS_OFFSET     __phys_offset
+#endif
+
+#ifndef PHYS_OFFSET
+#define PHYS_OFFSET     0
 #endif
 
+#define PHYS_PFN_OFFSET (PHYS_OFFSET >> PAGE_SHIFT)
+#define ARCH_PFN_OFFSET PHYS_PFN_OFFSET
+
 #define TASK_SIZE                       (PAGE_OFFSET)
 
 /*  not sure how these are used yet  */
diff --git a/arch/hexagon/include/asm/page.h b/arch/hexagon/include/asm/page.h
index 692adc213429..de1b2871d09c 100644
--- a/arch/hexagon/include/asm/page.h
+++ b/arch/hexagon/include/asm/page.h
@@ -96,8 +96,8 @@ typedef struct page *pgtable_t;
  * MIPS says they're only used during mem_init.
  * also, check if we need a PHYS_OFFSET.
  */
-#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET)
-#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET))
+#define __pa(x) ((unsigned long)(x) - PAGE_OFFSET + PHYS_OFFSET)
+#define __va(x) ((void *)((unsigned long)(x) - PHYS_OFFSET + PAGE_OFFSET))
 
 /* The "page frame" descriptor is defined in linux/mm.h */
 struct page;
@@ -147,6 +147,7 @@ static inline void clear_page(void *page)
  */
 #define kern_addr_valid(addr)   (1)
 
+#include <asm/mem-layout.h>
 #include <asm-generic/memory_model.h>
 /* XXX Todo: implement assembly-optimized version of getorder. */
 #include <asm-generic/getorder.h>