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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/um/sys-ppc
downloadop-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip
op-kernel-dev-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.gz
Linux-2.6.12-rc2v2.6.12-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/um/sys-ppc')
-rw-r--r--arch/um/sys-ppc/Makefile69
-rw-r--r--arch/um/sys-ppc/misc.S116
-rw-r--r--arch/um/sys-ppc/miscthings.c53
-rw-r--r--arch/um/sys-ppc/ptrace.c28
-rw-r--r--arch/um/sys-ppc/ptrace_user.c39
-rw-r--r--arch/um/sys-ppc/sigcontext.c15
-rw-r--r--arch/um/sys-ppc/sysrq.c43
7 files changed, 363 insertions, 0 deletions
diff --git a/arch/um/sys-ppc/Makefile b/arch/um/sys-ppc/Makefile
new file mode 100644
index 0000000..af20026
--- /dev/null
+++ b/arch/um/sys-ppc/Makefile
@@ -0,0 +1,69 @@
+OBJ = built-in.o
+
+.S.o:
+ $(CC) $(AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o
+
+OBJS = ptrace.o sigcontext.o semaphore.o checksum.o miscthings.o misc.o \
+ ptrace_user.o sysrq.o
+
+EXTRA_AFLAGS := -DCONFIG_PPC32 -I. -I$(TOPDIR)/arch/ppc/kernel
+
+all: $(OBJ)
+
+$(OBJ): $(OBJS)
+ rm -f $@
+ $(LD) $(LINKFLAGS) --start-group $^ --end-group -o $@
+
+ptrace_user.o: ptrace_user.c
+ $(CC) -D__KERNEL__ $(USER_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
+
+sigcontext.o: sigcontext.c
+ $(CC) $(USER_CFLAGS) $(EXTRA_CFLAGS) -c -o $@ $<
+
+semaphore.c:
+ rm -f $@
+ ln -s $(TOPDIR)/arch/ppc/kernel/$@ $@
+
+checksum.S:
+ rm -f $@
+ ln -s $(TOPDIR)/arch/ppc/lib/$@ $@
+
+mk_defs.c:
+ rm -f $@
+ ln -s $(TOPDIR)/arch/ppc/kernel/$@ $@
+
+ppc_defs.head:
+ rm -f $@
+ ln -s $(TOPDIR)/arch/ppc/kernel/$@ $@
+
+ppc_defs.h: mk_defs.c ppc_defs.head \
+ $(TOPDIR)/include/asm-ppc/mmu.h \
+ $(TOPDIR)/include/asm-ppc/processor.h \
+ $(TOPDIR)/include/asm-ppc/pgtable.h \
+ $(TOPDIR)/include/asm-ppc/ptrace.h
+# $(CC) $(CFLAGS) -S mk_defs.c
+ cp ppc_defs.head ppc_defs.h
+# for bk, this way we can write to the file even if it's not checked out
+ echo '#define THREAD 608' >> ppc_defs.h
+ echo '#define PT_REGS 8' >> ppc_defs.h
+ echo '#define CLONE_VM 256' >> ppc_defs.h
+# chmod u+w ppc_defs.h
+# grep '^#define' mk_defs.s >> ppc_defs.h
+# rm mk_defs.s
+
+# the asm link is horrible, and breaks the other targets. This is also
+# not going to work with parallel makes.
+
+checksum.o: checksum.S
+ rm -f asm
+ ln -s $(TOPDIR)/include/asm-ppc asm
+ $(CC) $(EXTRA_AFLAGS) $(AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o
+ rm -f asm
+
+misc.o: misc.S ppc_defs.h
+ rm -f asm
+ ln -s $(TOPDIR)/include/asm-ppc asm
+ $(CC) $(EXTRA_AFLAGS) $(AFLAGS) -D__ASSEMBLY__ -D__UM_PPC__ -c $< -o $*.o
+ rm -f asm
+
+clean-files := $(OBJS) ppc_defs.h checksum.S semaphore.c mk_defs.c
diff --git a/arch/um/sys-ppc/misc.S b/arch/um/sys-ppc/misc.S
new file mode 100644
index 0000000..11b7bd7
--- /dev/null
+++ b/arch/um/sys-ppc/misc.S
@@ -0,0 +1,116 @@
+/*
+ * This file contains miscellaneous low-level functions.
+ * Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
+ *
+ * Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
+ * and Paul Mackerras.
+ *
+ * A couple of functions stolen from arch/ppc/kernel/misc.S for UML
+ * by Chris Emerson.
+ *
+ * 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.
+ *
+ */
+
+#include <linux/config.h>
+#include <asm/processor.h>
+#include "ppc_asm.h"
+
+#if defined(CONFIG_4xx) || defined(CONFIG_8xx)
+#define CACHE_LINE_SIZE 16
+#define LG_CACHE_LINE_SIZE 4
+#define MAX_COPY_PREFETCH 1
+#elif !defined(CONFIG_PPC64BRIDGE)
+#define CACHE_LINE_SIZE 32
+#define LG_CACHE_LINE_SIZE 5
+#define MAX_COPY_PREFETCH 4
+#else
+#define CACHE_LINE_SIZE 128
+#define LG_CACHE_LINE_SIZE 7
+#define MAX_COPY_PREFETCH 1
+#endif /* CONFIG_4xx || CONFIG_8xx */
+
+ .text
+
+/*
+ * Clear a page using the dcbz instruction, which doesn't cause any
+ * memory traffic (except to write out any cache lines which get
+ * displaced). This only works on cacheable memory.
+ */
+_GLOBAL(clear_page)
+ li r0,4096/CACHE_LINE_SIZE
+ mtctr r0
+#ifdef CONFIG_8xx
+ li r4, 0
+1: stw r4, 0(r3)
+ stw r4, 4(r3)
+ stw r4, 8(r3)
+ stw r4, 12(r3)
+#else
+1: dcbz 0,r3
+#endif
+ addi r3,r3,CACHE_LINE_SIZE
+ bdnz 1b
+ blr
+
+/*
+ * Copy a whole page. We use the dcbz instruction on the destination
+ * to reduce memory traffic (it eliminates the unnecessary reads of
+ * the destination into cache). This requires that the destination
+ * is cacheable.
+ */
+#define COPY_16_BYTES \
+ lwz r6,4(r4); \
+ lwz r7,8(r4); \
+ lwz r8,12(r4); \
+ lwzu r9,16(r4); \
+ stw r6,4(r3); \
+ stw r7,8(r3); \
+ stw r8,12(r3); \
+ stwu r9,16(r3)
+
+_GLOBAL(copy_page)
+ addi r3,r3,-4
+ addi r4,r4,-4
+ li r5,4
+
+#ifndef CONFIG_8xx
+#if MAX_COPY_PREFETCH > 1
+ li r0,MAX_COPY_PREFETCH
+ li r11,4
+ mtctr r0
+11: dcbt r11,r4
+ addi r11,r11,CACHE_LINE_SIZE
+ bdnz 11b
+#else /* MAX_COPY_PREFETCH == 1 */
+ dcbt r5,r4
+ li r11,CACHE_LINE_SIZE+4
+#endif /* MAX_COPY_PREFETCH */
+#endif /* CONFIG_8xx */
+
+ li r0,4096/CACHE_LINE_SIZE
+ mtctr r0
+1:
+#ifndef CONFIG_8xx
+ dcbt r11,r4
+ dcbz r5,r3
+#endif
+ COPY_16_BYTES
+#if CACHE_LINE_SIZE >= 32
+ COPY_16_BYTES
+#if CACHE_LINE_SIZE >= 64
+ COPY_16_BYTES
+ COPY_16_BYTES
+#if CACHE_LINE_SIZE >= 128
+ COPY_16_BYTES
+ COPY_16_BYTES
+ COPY_16_BYTES
+ COPY_16_BYTES
+#endif
+#endif
+#endif
+ bdnz 1b
+ blr
diff --git a/arch/um/sys-ppc/miscthings.c b/arch/um/sys-ppc/miscthings.c
new file mode 100644
index 0000000..373061c
--- /dev/null
+++ b/arch/um/sys-ppc/miscthings.c
@@ -0,0 +1,53 @@
+#include "linux/threads.h"
+#include "linux/stddef.h" // for NULL
+#include "linux/elf.h" // for AT_NULL
+
+/* The following function nicked from arch/ppc/kernel/process.c and
+ * adapted slightly */
+/*
+ * XXX ld.so expects the auxiliary table to start on
+ * a 16-byte boundary, so we have to find it and
+ * move it up. :-(
+ */
+void shove_aux_table(unsigned long sp)
+{
+ int argc;
+ char *p;
+ unsigned long e;
+ unsigned long aux_start, offset;
+
+ argc = *(int *)sp;
+ sp += sizeof(int) + (argc + 1) * sizeof(char *);
+ /* skip over the environment pointers */
+ do {
+ p = *(char **)sp;
+ sp += sizeof(char *);
+ } while (p != NULL);
+ aux_start = sp;
+ /* skip to the end of the auxiliary table */
+ do {
+ e = *(unsigned long *)sp;
+ sp += 2 * sizeof(unsigned long);
+ } while (e != AT_NULL);
+ offset = ((aux_start + 15) & ~15) - aux_start;
+ if (offset != 0) {
+ do {
+ sp -= sizeof(unsigned long);
+ e = *(unsigned long *)sp;
+ *(unsigned long *)(sp + offset) = e;
+ } while (sp > aux_start);
+ }
+}
+/* END stuff taken from arch/ppc/kernel/process.c */
+
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/sys-ppc/ptrace.c b/arch/um/sys-ppc/ptrace.c
new file mode 100644
index 0000000..a971366d
--- /dev/null
+++ b/arch/um/sys-ppc/ptrace.c
@@ -0,0 +1,28 @@
+#include "linux/sched.h"
+#include "asm/ptrace.h"
+
+int putreg(struct task_struct *child, unsigned long regno,
+ unsigned long value)
+{
+ child->thread.process_regs.regs[regno >> 2] = value;
+ return 0;
+}
+
+unsigned long getreg(struct task_struct *child, unsigned long regno)
+{
+ unsigned long retval = ~0UL;
+
+ retval &= child->thread.process_regs.regs[regno >> 2];
+ return retval;
+}
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/sys-ppc/ptrace_user.c b/arch/um/sys-ppc/ptrace_user.c
new file mode 100644
index 0000000..ff0b9c0
--- /dev/null
+++ b/arch/um/sys-ppc/ptrace_user.c
@@ -0,0 +1,39 @@
+#include <errno.h>
+#include <asm/ptrace.h>
+#include "sysdep/ptrace.h"
+
+int ptrace_getregs(long pid, unsigned long *regs_out)
+{
+ int i;
+ for (i=0; i < sizeof(struct sys_pt_regs)/sizeof(PPC_REG); ++i) {
+ errno = 0;
+ regs_out->regs[i] = ptrace(PTRACE_PEEKUSR, pid, i*4, 0);
+ if (errno) {
+ return -errno;
+ }
+ }
+ return 0;
+}
+
+int ptrace_setregs(long pid, unsigned long *regs_in)
+{
+ int i;
+ for (i=0; i < sizeof(struct sys_pt_regs)/sizeof(PPC_REG); ++i) {
+ if (i != 34 /* FIXME: PT_ORIG_R3 */ && i <= PT_MQ) {
+ if (ptrace(PTRACE_POKEUSR, pid, i*4, regs_in->regs[i]) < 0) {
+ return -errno;
+ }
+ }
+ }
+ return 0;
+}
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/sys-ppc/sigcontext.c b/arch/um/sys-ppc/sigcontext.c
new file mode 100644
index 0000000..5d430fc
--- /dev/null
+++ b/arch/um/sys-ppc/sigcontext.c
@@ -0,0 +1,15 @@
+#include "asm/ptrace.h"
+#include "asm/sigcontext.h"
+#include "sysdep/ptrace.h"
+#include "user_util.h"
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
diff --git a/arch/um/sys-ppc/sysrq.c b/arch/um/sys-ppc/sysrq.c
new file mode 100644
index 0000000..82d6e93
--- /dev/null
+++ b/arch/um/sys-ppc/sysrq.c
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2001 Chris Emerson (cemerson@chiark.greenend.org.uk)
+ * Licensed under the GPL
+ */
+
+#include "linux/kernel.h"
+#include "linux/smp.h"
+#include "asm/ptrace.h"
+#include "sysrq.h"
+
+void show_regs(struct pt_regs_subarch *regs)
+{
+ printk("\n");
+ printk("show_regs(): insert regs here.\n");
+#if 0
+ printk("\n");
+ printk("EIP: %04x:[<%08lx>] CPU: %d",0xffff & regs->xcs, regs->eip,
+ smp_processor_id());
+ if (regs->xcs & 3)
+ printk(" ESP: %04x:%08lx",0xffff & regs->xss, regs->esp);
+ printk(" EFLAGS: %08lx\n", regs->eflags);
+ printk("EAX: %08lx EBX: %08lx ECX: %08lx EDX: %08lx\n",
+ regs->eax, regs->ebx, regs->ecx, regs->edx);
+ printk("ESI: %08lx EDI: %08lx EBP: %08lx",
+ regs->esi, regs->edi, regs->ebp);
+ printk(" DS: %04x ES: %04x\n",
+ 0xffff & regs->xds, 0xffff & regs->xes);
+#endif
+
+ show_trace(&regs->gpr[1]);
+}
+
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only. This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */
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