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authorLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-04-16 15:20:36 -0700
commit1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch)
tree0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/sh/kernel/cpu/sh3
downloadlinux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz
linux-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
Diffstat (limited to 'arch/sh/kernel/cpu/sh3')
-rw-r--r--arch/sh/kernel/cpu/sh3/Makefile6
-rw-r--r--arch/sh/kernel/cpu/sh3/ex.S199
-rw-r--r--arch/sh/kernel/cpu/sh3/probe.c97
3 files changed, 302 insertions, 0 deletions
diff --git a/arch/sh/kernel/cpu/sh3/Makefile b/arch/sh/kernel/cpu/sh3/Makefile
new file mode 100644
index 000000000000..a64532e4dc63
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the Linux/SuperH SH-3 backends.
+#
+
+obj-y := ex.o probe.o
+
diff --git a/arch/sh/kernel/cpu/sh3/ex.S b/arch/sh/kernel/cpu/sh3/ex.S
new file mode 100644
index 000000000000..966c0858b714
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/ex.S
@@ -0,0 +1,199 @@
+/*
+ * arch/sh/kernel/cpu/sh3/ex.S
+ *
+ * The SH-3 exception vector table.
+
+ * Copyright (C) 1999, 2000, 2002 Niibe Yutaka
+ * Copyright (C) 2003 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+#include <linux/linkage.h>
+#include <linux/config.h>
+
+ .align 2
+ .data
+
+ENTRY(exception_handling_table)
+ .long exception_error /* 000 */
+ .long exception_error
+#if defined(CONFIG_MMU)
+ .long tlb_miss_load /* 040 */
+ .long tlb_miss_store
+ .long initial_page_write
+ .long tlb_protection_violation_load
+ .long tlb_protection_violation_store
+ .long address_error_load
+ .long address_error_store /* 100 */
+#else
+ .long exception_error ! tlb miss load /* 040 */
+ .long exception_error ! tlb miss store
+ .long exception_error ! initial page write
+ .long exception_error ! tlb prot violation load
+ .long exception_error ! tlb prot violation store
+ .long exception_error ! address error load
+ .long exception_error ! address error store /* 100 */
+#endif
+ .long exception_error ! fpu_exception /* 120 */
+ .long exception_error /* 140 */
+ .long system_call ! Unconditional Trap /* 160 */
+ .long exception_error ! reserved_instruction (filled by trap_init) /* 180 */
+ .long exception_error ! illegal_slot_instruction (filled by trap_init) /*1A0*/
+ENTRY(nmi_slot)
+#if defined (CONFIG_KGDB_NMI)
+ .long debug_enter /* 1C0 */ ! Allow trap to debugger
+#else
+ .long exception_none /* 1C0 */ ! Not implemented yet
+#endif
+ENTRY(user_break_point_trap)
+ .long break_point_trap /* 1E0 */
+ENTRY(interrupt_table)
+ ! external hardware
+ .long do_IRQ ! 0000 /* 200 */
+ .long do_IRQ ! 0001
+ .long do_IRQ ! 0010
+ .long do_IRQ ! 0011
+ .long do_IRQ ! 0100
+ .long do_IRQ ! 0101
+ .long do_IRQ ! 0110
+ .long do_IRQ ! 0111
+ .long do_IRQ ! 1000 /* 300 */
+ .long do_IRQ ! 1001
+ .long do_IRQ ! 1010
+ .long do_IRQ ! 1011
+ .long do_IRQ ! 1100
+ .long do_IRQ ! 1101
+ .long do_IRQ ! 1110
+ .long exception_error
+ ! Internal hardware
+ .long do_IRQ ! TMU0 tuni0 /* 400 */
+ .long do_IRQ ! TMU1 tuni1
+ .long do_IRQ ! TMU2 tuni2
+ .long do_IRQ ! ticpi2
+ .long do_IRQ ! RTC ati
+ .long do_IRQ ! pri
+ .long do_IRQ ! cui
+ .long do_IRQ ! SCI eri
+ .long do_IRQ ! rxi /* 500 */
+ .long do_IRQ ! txi
+ .long do_IRQ ! tei
+ .long do_IRQ ! WDT iti /* 560 */
+ .long do_IRQ ! REF rcmi
+ .long do_IRQ ! rovi
+ .long do_IRQ
+ .long do_IRQ /* 5E0 */
+#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7709) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7300) || defined(CONFIG_CPU_SUBTYPE_SH7705)
+ .long do_IRQ ! 32 IRQ irq0 /* 600 */
+ .long do_IRQ ! 33 irq1
+ .long do_IRQ ! 34 irq2
+ .long do_IRQ ! 35 irq3
+ .long do_IRQ ! 36 irq4
+ .long do_IRQ ! 37 irq5
+ .long do_IRQ ! 38
+ .long do_IRQ ! 39
+ .long do_IRQ ! 40 PINT pint0-7 /* 700 */
+ .long do_IRQ ! 41 pint8-15
+ .long do_IRQ ! 42
+ .long do_IRQ ! 43
+ .long do_IRQ ! 44
+ .long do_IRQ ! 45
+ .long do_IRQ ! 46
+ .long do_IRQ ! 47
+ .long do_IRQ ! 48 DMAC dei0 /* 800 */
+ .long do_IRQ ! 49 dei1
+ .long do_IRQ ! 50 dei2
+ .long do_IRQ ! 51 dei3
+ .long do_IRQ ! 52 IrDA eri1
+ .long do_IRQ ! 53 rxi1
+ .long do_IRQ ! 54 bri1
+ .long do_IRQ ! 55 txi1
+ .long do_IRQ ! 56 SCIF eri2
+ .long do_IRQ ! 57 rxi2
+ .long do_IRQ ! 58 bri2
+ .long do_IRQ ! 59 txi2
+ .long do_IRQ ! 60 ADC adi /* 980 */
+#if defined(CONFIG_CPU_SUBTYPE_SH7705)
+ .long exception_none ! 61 /* 9A0 */
+ .long exception_none ! 62
+ .long exception_none ! 63
+ .long exception_none ! 64 /* A00 */
+ .long do_IRQ ! 65 USB usi0
+ .long do_IRQ ! 66 usi1
+ .long exception_none ! 67
+ .long exception_none ! 68
+ .long exception_none ! 69
+ .long exception_none ! 70
+ .long exception_none ! 71
+ .long exception_none ! 72 /* B00 */
+ .long exception_none ! 73
+ .long exception_none ! 74
+ .long exception_none ! 75
+ .long exception_none ! 76
+ .long exception_none ! 77
+ .long exception_none ! 78
+ .long exception_none ! 79
+ .long do_IRQ ! 80 TPU0 tpi0 /* C00 */
+ .long do_IRQ ! 81 TPU1 tpi1
+ .long exception_none ! 82
+ .long exception_none ! 83
+ .long do_IRQ ! 84 TPU2 tpi2
+ .long do_IRQ ! 85 TPU3 tpi3 /* CA0 */
+#endif
+#if defined(CONFIG_CPU_SUBTYPE_SH7707) || defined(CONFIG_CPU_SUBTYPE_SH7300)
+ .long do_IRQ ! 61 LCDC lcdi /* 9A0 */
+ .long do_IRQ ! 62 PCC pcc0i
+ .long do_IRQ ! 63 pcc1i /* 9E0 */
+#endif
+#if defined(CONFIG_CPU_SUBTYPE_SH7300)
+ .long do_IRQ ! 64
+ .long do_IRQ ! 65
+ .long do_IRQ ! 66
+ .long do_IRQ ! 67
+ .long do_IRQ ! 68
+ .long do_IRQ ! 69
+ .long do_IRQ ! 70
+ .long do_IRQ ! 71
+ .long do_IRQ ! 72
+ .long do_IRQ ! 73
+ .long do_IRQ ! 74
+ .long do_IRQ ! 75
+ .long do_IRQ ! 76
+ .long do_IRQ ! 77
+ .long do_IRQ ! 78
+ .long do_IRQ ! 79
+ .long do_IRQ ! 80 SCIF0(SH7300)
+ .long do_IRQ ! 81
+ .long do_IRQ ! 82
+ .long do_IRQ ! 83
+ .long do_IRQ ! 84
+ .long do_IRQ ! 85
+ .long do_IRQ ! 86
+ .long do_IRQ ! 87
+ .long do_IRQ ! 88
+ .long do_IRQ ! 89
+ .long do_IRQ ! 90
+ .long do_IRQ ! 91
+ .long do_IRQ ! 92
+ .long do_IRQ ! 93
+ .long do_IRQ ! 94
+ .long do_IRQ ! 95
+ .long do_IRQ ! 96
+ .long do_IRQ ! 97
+ .long do_IRQ ! 98
+ .long do_IRQ ! 99
+ .long do_IRQ ! 100
+ .long do_IRQ ! 101
+ .long do_IRQ ! 102
+ .long do_IRQ ! 103
+ .long do_IRQ ! 104
+ .long do_IRQ ! 105
+ .long do_IRQ ! 106
+ .long do_IRQ ! 107
+ .long do_IRQ ! 108
+#endif
+#endif
+
diff --git a/arch/sh/kernel/cpu/sh3/probe.c b/arch/sh/kernel/cpu/sh3/probe.c
new file mode 100644
index 000000000000..5cdc88638601
--- /dev/null
+++ b/arch/sh/kernel/cpu/sh3/probe.c
@@ -0,0 +1,97 @@
+/*
+ * arch/sh/kernel/cpu/sh3/probe.c
+ *
+ * CPU Subtype Probing for SH-3.
+ *
+ * Copyright (C) 1999, 2000 Niibe Yutaka
+ * Copyright (C) 2002 Paul Mundt
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ */
+
+#include <linux/init.h>
+#include <asm/processor.h>
+#include <asm/cache.h>
+#include <asm/io.h>
+
+int __init detect_cpu_and_cache_system(void)
+{
+ unsigned long addr0, addr1, data0, data1, data2, data3;
+
+ jump_to_P2();
+ /*
+ * Check if the entry shadows or not.
+ * When shadowed, it's 128-entry system.
+ * Otherwise, it's 256-entry system.
+ */
+ addr0 = CACHE_OC_ADDRESS_ARRAY + (3 << 12);
+ addr1 = CACHE_OC_ADDRESS_ARRAY + (1 << 12);
+
+ /* First, write back & invalidate */
+ data0 = ctrl_inl(addr0);
+ ctrl_outl(data0&~(SH_CACHE_VALID|SH_CACHE_UPDATED), addr0);
+ data1 = ctrl_inl(addr1);
+ ctrl_outl(data1&~(SH_CACHE_VALID|SH_CACHE_UPDATED), addr1);
+
+ /* Next, check if there's shadow or not */
+ data0 = ctrl_inl(addr0);
+ data0 ^= SH_CACHE_VALID;
+ ctrl_outl(data0, addr0);
+ data1 = ctrl_inl(addr1);
+ data2 = data1 ^ SH_CACHE_VALID;
+ ctrl_outl(data2, addr1);
+ data3 = ctrl_inl(addr0);
+
+ /* Lastly, invaliate them. */
+ ctrl_outl(data0&~SH_CACHE_VALID, addr0);
+ ctrl_outl(data2&~SH_CACHE_VALID, addr1);
+
+ back_to_P1();
+
+ cpu_data->dcache.ways = 4;
+ cpu_data->dcache.entry_shift = 4;
+ cpu_data->dcache.linesz = L1_CACHE_BYTES;
+ cpu_data->dcache.flags = 0;
+
+ /*
+ * 7709A/7729 has 16K cache (256-entry), while 7702 has only
+ * 2K(direct) 7702 is not supported (yet)
+ */
+ if (data0 == data1 && data2 == data3) { /* Shadow */
+ cpu_data->dcache.way_incr = (1 << 11);
+ cpu_data->dcache.entry_mask = 0x7f0;
+ cpu_data->dcache.sets = 128;
+ cpu_data->type = CPU_SH7708;
+
+ cpu_data->flags |= CPU_HAS_MMU_PAGE_ASSOC;
+ } else { /* 7709A or 7729 */
+ cpu_data->dcache.way_incr = (1 << 12);
+ cpu_data->dcache.entry_mask = 0xff0;
+ cpu_data->dcache.sets = 256;
+ cpu_data->type = CPU_SH7729;
+
+#if defined(CONFIG_CPU_SUBTYPE_SH7705)
+ cpu_data->type = CPU_SH7705;
+
+#if defined(CONFIG_SH7705_CACHE_32KB)
+ cpu_data->dcache.way_incr = (1 << 13);
+ cpu_data->dcache.entry_mask = 0x1ff0;
+ cpu_data->dcache.sets = 512;
+ ctrl_outl(CCR_CACHE_32KB, CCR3);
+#else
+ ctrl_outl(CCR_CACHE_16KB, CCR3);
+#endif
+#endif
+ }
+
+ /*
+ * SH-3 doesn't have separate caches
+ */
+ cpu_data->dcache.flags |= SH_CACHE_COMBINED;
+ cpu_data->icache = cpu_data->dcache;
+
+ return 0;
+}
+