xtensa: rework {CONFIG,PLATFORM}_DEFAULT_MEM_START

Drop PLATFORM_DEFAULT_MEM_START from the platform/hardware.h headers.
Provide definition of CONFIG_DEFAULT_MEM_START always, allow changing it
only in noMMU configurations when PLATFORM_WANT_DEFAULT_MEM is selected.
Change prompt and description so that it's clear that it controls
PAGE_OFFSET and PHYS_OFFSET.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>

5 files changed, 9 insertions, 31 deletions

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 787515c6770e..e82ed7216eca 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -530,14 +530,13 @@ config PLATFORM_WANT_DEFAULT_MEM
         def_bool n
 
 config DEFAULT_MEM_START
-        hex "Physical address of the default memory area start"
-        depends on PLATFORM_WANT_DEFAULT_MEM
-        default 0x00000000 if MMU
-        default 0x60000000 if !MMU
-        help
-          This is the base address of the default memory area.
-          Default memory area has platform-specific meaning, it may be used
-          for e.g. early cache initialization.
+        hex
+        prompt "PAGE_OFFSET/PHYS_OFFSET" if !MMU && PLATFORM_WANT_DEFAULT_MEM
+        default 0x60000000 if PLATFORM_WANT_DEFAULT_MEM
+        default 0x00000000
+        help
+          This is the base address used for both PAGE_OFFSET and PHYS_OFFSET
+          in noMMU configurations.
 
           If unsure, leave the default value here.
 
diff --git a/arch/xtensa/include/asm/page.h b/arch/xtensa/include/asm/page.h
index 5d69c11c01b8..09c56cba442e 100644
--- a/arch/xtensa/include/asm/page.h
+++ b/arch/xtensa/include/asm/page.h
@@ -14,7 +14,6 @@
 #include <asm/processor.h>
 #include <asm/types.h>
 #include <asm/cache.h>
-#include <platform/hardware.h>
 #include <asm/kmem_layout.h>
 
 /*
@@ -31,8 +30,8 @@
 #define MAX_LOW_PFN     (PHYS_PFN(XCHAL_KSEG_PADDR) + \
                          PHYS_PFN(XCHAL_KSEG_SIZE))
 #else
-#define PAGE_OFFSET     PLATFORM_DEFAULT_MEM_START
-#define PHYS_OFFSET     PLATFORM_DEFAULT_MEM_START
+#define PAGE_OFFSET     _AC(CONFIG_DEFAULT_MEM_START, UL)
+#define PHYS_OFFSET     _AC(CONFIG_DEFAULT_MEM_START, UL)
 #define MAX_LOW_PFN     PHYS_PFN(0xfffffffful)
 #endif
 
diff --git a/arch/xtensa/platforms/iss/include/platform/hardware.h b/arch/xtensa/platforms/iss/include/platform/hardware.h
index 9acea2508c05..254906a89a2b 100644
--- a/arch/xtensa/platforms/iss/include/platform/hardware.h
+++ b/arch/xtensa/platforms/iss/include/platform/hardware.h
@@ -15,14 +15,4 @@
 #ifndef _XTENSA_PLATFORM_ISS_HARDWARE_H
 #define _XTENSA_PLATFORM_ISS_HARDWARE_H
 
-/*
- * Memory configuration.
- */
-
-#define PLATFORM_DEFAULT_MEM_START      0x00000000
-
-/*
- * Interrupt configuration.
- */
-
 #endif /* _XTENSA_PLATFORM_ISS_HARDWARE_H */
diff --git a/arch/xtensa/platforms/xt2000/include/platform/hardware.h b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
index 4ad16bfc63b8..a309ec190777 100644
--- a/arch/xtensa/platforms/xt2000/include/platform/hardware.h
+++ b/arch/xtensa/platforms/xt2000/include/platform/hardware.h
@@ -17,12 +17,6 @@
 
 #include <variant/core.h>
 
-/* 
- * Memory configuration.
- */
-
-#define PLATFORM_DEFAULT_MEM_START 0x00000000
-
 /*
  * Number of platform IRQs
  */
diff --git a/arch/xtensa/platforms/xtfpga/include/platform/hardware.h b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
index cbf3cddafeaf..99d9bcbec57e 100644
--- a/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
+++ b/arch/xtensa/platforms/xtfpga/include/platform/hardware.h
@@ -17,10 +17,6 @@
 #ifndef __XTENSA_XTAVNET_HARDWARE_H
 #define __XTENSA_XTAVNET_HARDWARE_H
 
-/* Memory configuration. */
-
-#define PLATFORM_DEFAULT_MEM_START __XTENSA_UL(CONFIG_DEFAULT_MEM_START)
-
 /* Interrupt configuration. */
 
 #define PLATFORM_NR_IRQS        0