[PATCH] ppc32/8xx: Fix r3 trashing due to 8MB TLB page instantiation

[powerpc.git] / arch / ppc / syslib / m8xx_setup.c

diff --git a/arch/ppc/syslib/m8xx_setup.c b/arch/ppc/syslib/m8xx_setup.c
index ff02824..dae9af7 100644 (file)
--- a/arch/ppc/syslib/m8xx_setup.c
+++ b/arch/ppc/syslib/m8xx_setup.c
@@ -1,6 +1,4 @@
 /*
- *  arch/ppc/kernel/setup.c
- *
  *  Copyright (C) 1995  Linus Torvalds
  *  Adapted from 'alpha' version by Gary Thomas
  *  Modified by Cort Dougan (cort@cs.nmt.edu)
@@ -34,6 +32,13 @@
 #include <linux/seq_file.h>
 #include <linux/root_dev.h>
 
+#if defined(CONFIG_MTD) && defined(CONFIG_MTD_PHYSMAP)
+#include <linux/mtd/partitions.h>
+#include <linux/mtd/physmap.h>
+#include <linux/mtd/mtd.h>
+#include <linux/mtd/map.h>
+#endif
+
 #include <asm/mmu.h>
 #include <asm/reg.h>
 #include <asm/residual.h>
@@ -49,6 +54,34 @@
 
 #include "ppc8xx_pic.h"
 
+#ifdef CONFIG_MTD_PHYSMAP
+#define MPC8xxADS_BANK_WIDTH 4
+#endif
+
+#define MPC8xxADS_U_BOOT_SIZE          0x80000
+#define MPC8xxADS_FREE_AREA_OFFSET     MPC8xxADS_U_BOOT_SIZE
+
+#if defined(CONFIG_MTD_PARTITIONS)
+ /*
+   NOTE: bank width and interleave relative to the installed flash
+   should have been chosen within MTD_CFI_GEOMETRY options.
+ */
+static struct mtd_partition mpc8xxads_partitions[] = {
+       {
+               .name = "bootloader",
+               .size = MPC8xxADS_U_BOOT_SIZE,
+               .offset = 0,
+               .mask_flags   = MTD_WRITEABLE,  /* force read-only */
+       }, {
+               .name = "User FS",
+               .offset = MPC8xxADS_FREE_AREA_OFFSET
+       }
+};
+
+#define mpc8xxads_part_num (sizeof (mpc8xxads_partitions) / sizeof (mpc8xxads_partitions[0]))
+
+#endif
+
 static int m8xx_set_rtc_time(unsigned long time);
 static unsigned long m8xx_get_rtc_time(void);
 void m8xx_calibrate_decr(void);
@@ -71,6 +104,10 @@ board_init(void)
 void __init
 m8xx_setup_arch(void)
 {
+#if defined(CONFIG_MTD) && defined(CONFIG_MTD_PHYSMAP)
+       bd_t *binfo = (bd_t *)__res;
+#endif
+
        /* Reset the Communication Processor Module.
        */
        m8xx_cpm_reset();
@@ -106,6 +143,17 @@ m8xx_setup_arch(void)
        }
 #endif
 #endif
+
+#if defined (CONFIG_MPC86XADS) || defined (CONFIG_MPC885ADS)
+#if defined(CONFIG_MTD_PHYSMAP)
+       physmap_configure(binfo->bi_flashstart, binfo->bi_flashsize,
+                                               MPC8xxADS_BANK_WIDTH, NULL);
+#ifdef CONFIG_MTD_PARTITIONS
+       physmap_set_partitions(mpc8xxads_partitions, mpc8xxads_part_num);
+#endif /* CONFIG_MTD_PARTITIONS */
+#endif /* CONFIG_MTD_PHYSMAP */
+#endif
+
        board_init();
 }