[PATCH] powerpc: merge code values for identifying platforms

This patch merges platform codes.  systemcfg->platform is no longer used,
systemcfg use in general is deprecated as much as possible (and renamed
_systemcfg before it gets completely moved elsewhere in a future patch),
_machine is now used on ppc64 along as ppc32.  Platform codes aren't gone
yet but we are getting a step closer. A bunch of asm code in head[_64].S
is also turned into C code.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

4 files changed, 111 insertions, 31 deletions

diff --git a/include/asm-powerpc/firmware.h b/include/asm-powerpc/firmware.h
index 806c142ae9ea..12fabbcb04f0 100644
--- a/include/asm-powerpc/firmware.h
+++ b/include/asm-powerpc/firmware.h
@@ -43,6 +43,7 @@
 #define FW_FEATURE_ISERIES      (1UL<<21)
 
 enum {
+#ifdef CONFIG_PPC64
         FW_FEATURE_PSERIES_POSSIBLE = FW_FEATURE_PFT | FW_FEATURE_TCE |
                 FW_FEATURE_SPRG0 | FW_FEATURE_DABR | FW_FEATURE_COPY |
                 FW_FEATURE_ASR | FW_FEATURE_DEBUG | FW_FEATURE_TERM |
@@ -70,6 +71,11 @@ enum {
                 FW_FEATURE_ISERIES_ALWAYS &
 #endif
                 FW_FEATURE_POSSIBLE,
+
+#else /* CONFIG_PPC64 */
+        FW_FEATURE_POSSIBLE = 0,
+        FW_FEATURE_ALWAYS = 0,
+#endif
 };
 
 /* This is used to identify firmware features which are available
diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index 1dc4bf7b52b3..82e3f4e6550d 100644
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -17,65 +17,74 @@
 #include <linux/compiler.h>
 #include <asm/ptrace.h>
 #include <asm/types.h>
-#ifdef CONFIG_PPC64
-#include <asm/systemcfg.h>
-#endif
 
-#ifdef CONFIG_PPC32
-/* 32-bit platform types */
-/* We only need to define a new _MACH_xxx for machines which are part of
- * a configuration which supports more than one type of different machine.
- * This is currently limited to CONFIG_PPC_MULTIPLATFORM and CHRP/PReP/PMac.
- * -- Tom
+/* We do _not_ want to define new machine types at all, those must die
+ * in favor of using the device-tree
+ * -- BenH.
  */
-#define _MACH_prep      0x00000001
-#define _MACH_Pmac      0x00000002      /* pmac or pmac clone (non-chrp) */
-#define _MACH_chrp      0x00000004      /* chrp machine */
 
-/* see residual.h for these */
+/* Platforms codes (to be obsoleted) */
+#define PLATFORM_PSERIES        0x0100
+#define PLATFORM_PSERIES_LPAR   0x0101
+#define PLATFORM_ISERIES_LPAR   0x0201
+#define PLATFORM_LPAR           0x0001
+#define PLATFORM_POWERMAC       0x0400
+#define PLATFORM_MAPLE          0x0500
+#define PLATFORM_PREP           0x0600
+#define PLATFORM_CHRP           0x0700
+#define PLATFORM_CELL           0x1000
+
+/* Compat platform codes for 32 bits */
+#define _MACH_prep      PLATFORM_PREP
+#define _MACH_Pmac      PLATFORM_POWERMAC
+#define _MACH_chrp      PLATFORM_CHRP
+
+/* PREP sub-platform types see residual.h for these */
 #define _PREP_Motorola  0x01    /* motorola prep */
 #define _PREP_Firm      0x02    /* firmworks prep */
 #define _PREP_IBM       0x00    /* ibm prep */
 #define _PREP_Bull      0x03    /* bull prep */
 
-/* these are arbitrary */
+/* CHRP sub-platform types. These are arbitrary */
 #define _CHRP_Motorola  0x04    /* motorola chrp, the cobra */
 #define _CHRP_IBM       0x05    /* IBM chrp, the longtrail and longtrail 2 */
 #define _CHRP_Pegasos   0x06    /* Genesi/bplan's Pegasos and Pegasos2 */
 
-#ifdef CONFIG_PPC_MULTIPLATFORM
+#define platform_is_pseries()   (_machine == PLATFORM_PSERIES || \
+                                 _machine == PLATFORM_PSERIES_LPAR)
+#define platform_is_lpar()      (!!(_machine & PLATFORM_LPAR))
+
+#if defined(CONFIG_PPC_MULTIPLATFORM)
 extern int _machine;
 
+#ifdef CONFIG_PPC32
+
 /* what kind of prep workstation we are */
 extern int _prep_type;
 extern int _chrp_type;
 
 /*
  * This is used to identify the board type from a given PReP board
- * vendor. Board revision is also made available.
+ * vendor. Board revision is also made available. This will be moved
+ * elsewhere soon
  */
 extern unsigned char ucSystemType;
 extern unsigned char ucBoardRev;
 extern unsigned char ucBoardRevMaj, ucBoardRevMin;
+
+#endif /* CONFIG_PPC32 */
+
+#elif defined(CONFIG_PPC_ISERIES)
+/*
+ * iSeries is soon to become MULTIPLATFORM hopefully ...
+ */
+#define _machine CONFIG_PPC_ISERIES_LPAR
 #else
 #define _machine 0
 #endif /* CONFIG_PPC_MULTIPLATFORM */
-#endif /* CONFIG_PPC32 */
 
-#ifdef CONFIG_PPC64
-/* Platforms supported by PPC64 */
-#define PLATFORM_PSERIES      0x0100
-#define PLATFORM_PSERIES_LPAR 0x0101
-#define PLATFORM_ISERIES_LPAR 0x0201
-#define PLATFORM_LPAR         0x0001
-#define PLATFORM_POWERMAC     0x0400
-#define PLATFORM_MAPLE        0x0500
-#define PLATFORM_CELL         0x1000
-
-/* Compatibility with drivers coming from PPC32 world */
-#define _machine        (systemcfg->platform)
-#define _MACH_Pmac      PLATFORM_POWERMAC
-#endif
+
+
 
 /*
  * Default implementation of macro that returns current
diff --git a/include/asm-powerpc/reg.h b/include/asm-powerpc/reg.h
index ef121f4f0bab..eb392d038ed7 100644
--- a/include/asm-powerpc/reg.h
+++ b/include/asm-powerpc/reg.h
@@ -363,6 +363,7 @@
 #define SPRN_RPA        0x3D6   /* Required Physical Address Register */
 #define SPRN_SDA        0x3BF   /* Sampled Data Address Register */
 #define SPRN_SDR1       0x019   /* MMU Hash Base Register */
+#define SPRN_ASR        0x118   /* Address Space Register */
 #define SPRN_SIA        0x3BB   /* Sampled Instruction Address Register */
 #define SPRN_SPRG0      0x110   /* Special Purpose Register General 0 */
 #define SPRN_SPRG1      0x111   /* Special Purpose Register General 1 */
diff --git a/include/asm-powerpc/systemcfg.h b/include/asm-powerpc/systemcfg.h
new file mode 100644
index 000000000000..36b5cbe466f1
--- /dev/null
+++ b/include/asm-powerpc/systemcfg.h
@@ -0,0 +1,64 @@
+#ifndef _SYSTEMCFG_H
+#define _SYSTEMCFG_H
+
+/*
+ * Copyright (C) 2002 Peter Bergner <bergner@vnet.ibm.com>, IBM
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+/* Change Activity:
+ * 2002/09/30 : bergner  : Created
+ * End Change Activity
+ */
+
+/*
+ * If the major version changes we are incompatible.
+ * Minor version changes are a hint.
+ */
+#define SYSTEMCFG_MAJOR 1
+#define SYSTEMCFG_MINOR 1
+
+#ifndef __ASSEMBLY__
+
+#include <linux/unistd.h>
+
+#define SYSCALL_MAP_SIZE      ((__NR_syscalls + 31) / 32)
+
+struct systemcfg {
+        __u8  eye_catcher[16];          /* Eyecatcher: SYSTEMCFG:PPC64  0x00 */
+        struct {                        /* Systemcfg version numbers         */
+                __u32 major;            /* Major number                 0x10 */
+                __u32 minor;            /* Minor number                 0x14 */
+        } version;
+
+        __u32 platform;                 /* Platform flags               0x18 */
+        __u32 processor;                /* Processor type               0x1C */
+        __u64 processorCount;           /* # of physical processors     0x20 */
+        __u64 physicalMemorySize;       /* Size of real memory(B)       0x28 */
+        __u64 tb_orig_stamp;            /* Timebase at boot             0x30 */
+        __u64 tb_ticks_per_sec;         /* Timebase tics / sec          0x38 */
+        __u64 tb_to_xs;                 /* Inverse of TB to 2^20        0x40 */
+        __u64 stamp_xsec;               /*                              0x48 */
+        __u64 tb_update_count;          /* Timebase atomicity ctr       0x50 */
+        __u32 tz_minuteswest;           /* Minutes west of Greenwich    0x58 */
+        __u32 tz_dsttime;               /* Type of dst correction       0x5C */
+        /* next four are no longer used except to be exported to /proc */
+        __u32 dcache_size;              /* L1 d-cache size              0x60 */
+        __u32 dcache_line_size;         /* L1 d-cache line size         0x64 */
+        __u32 icache_size;              /* L1 i-cache size              0x68 */
+        __u32 icache_line_size;         /* L1 i-cache line size         0x6C */
+        __u32 syscall_map_64[SYSCALL_MAP_SIZE]; /* map of available syscalls 0x70 */
+        __u32 syscall_map_32[SYSCALL_MAP_SIZE]; /* map of available syscalls */
+};
+
+#ifdef __KERNEL__
+extern struct systemcfg *_systemcfg; /* to be renamed */
+#endif
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* _SYSTEMCFG_H */