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 c144bee..6b81e4d 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 af16e97..1426cd7 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 692adc213..de1b287 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>