From 0ec57e53c945fe962b190953f61e1ffd127e68d3 Mon Sep 17 00:00:00 2001
From: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Date: Tue, 17 Jan 2006 00:24:42 -0200
Subject: [PATCH] powerpc: generalize PPC44x_PIN_SIZE

The following patch generalizes PPC44x_PIN_SIZE by changing it to
PPC_PIN_SIZE, which can be defined by any sub-arch to automatically adjust
VMALLOC_START.

Define PPC_PIN_SIZE on 8xx, avoiding potential conflicts with the
pinned space.

Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 include/asm-ppc/ibm44x.h  | 2 +-
 include/asm-ppc/mpc8xx.h  | 2 ++
 include/asm-ppc/pgtable.h | 6 +++---
 3 files changed, 6 insertions(+), 4 deletions(-)

(limited to 'include/asm-ppc')

diff --git a/include/asm-ppc/ibm44x.h b/include/asm-ppc/ibm44x.h
index f835066fb3c..3acc382cc83 100644
--- a/include/asm-ppc/ibm44x.h
+++ b/include/asm-ppc/ibm44x.h
@@ -29,7 +29,7 @@
 
 /* TLB entry offset/size used for pinning kernel lowmem */
 #define PPC44x_PIN_SHIFT	28
-#define PPC44x_PIN_SIZE		(1 << PPC44x_PIN_SHIFT)
+#define PPC_PIN_SIZE		(1 << PPC44x_PIN_SHIFT)
 
 /* Lowest TLB slot consumed by the default pinned TLBs */
 #define PPC44x_LOW_SLOT		63
diff --git a/include/asm-ppc/mpc8xx.h b/include/asm-ppc/mpc8xx.h
index 46f159cf589..73ec9a6db0b 100644
--- a/include/asm-ppc/mpc8xx.h
+++ b/include/asm-ppc/mpc8xx.h
@@ -113,6 +113,8 @@ enum ppc_sys_devices {
 	MPC8xx_CPM_USB,
 };
 
+#define PPC_PIN_SIZE	(24 * 1024 * 1024)	/* 24Mbytes of data pinned */
+
 #ifndef BOARD_CHIP_NAME
 #define BOARD_CHIP_NAME ""
 #endif
diff --git a/include/asm-ppc/pgtable.h b/include/asm-ppc/pgtable.h
index 6d1c39e8a6a..e1c62da12e7 100644
--- a/include/asm-ppc/pgtable.h
+++ b/include/asm-ppc/pgtable.h
@@ -12,6 +12,7 @@
 #include <asm/processor.h>		/* For TASK_SIZE */
 #include <asm/mmu.h>
 #include <asm/page.h>
+#include <asm/io.h>			/* For sub-arch specific PPC_PIN_SIZE */
 struct mm_struct;
 
 extern unsigned long va_to_phys(unsigned long address);
@@ -127,9 +128,8 @@ extern unsigned long ioremap_bot, ioremap_base;
  * of RAM.  -- Cort
  */
 #define VMALLOC_OFFSET (0x1000000) /* 16M */
-#ifdef CONFIG_44x
-#include <asm/ibm44x.h>
-#define VMALLOC_START (((_ALIGN((long)high_memory, PPC44x_PIN_SIZE) + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))
+#ifdef PPC_PIN_SIZE
+#define VMALLOC_START (((_ALIGN((long)high_memory, PPC_PIN_SIZE) + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))
 #else
 #define VMALLOC_START ((((long)high_memory + VMALLOC_OFFSET) & ~(VMALLOC_OFFSET-1)))
 #endif
-- 
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