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!
diff --git a/arch/sparc/lib/rwsem.S b/arch/sparc/lib/rwsem.S
new file mode 100644
index 0000000..e7578dc
--- /dev/null
+++ b/arch/sparc/lib/rwsem.S
@@ -0,0 +1,205 @@
+/* $Id: rwsem.S,v 1.5 2000/05/09 17:40:13 davem Exp $
+ * Assembly part of rw semaphores.
+ *
+ * Copyright (C) 1999 Jakub Jelinek (jakub@redhat.com)
+ */
+
+#include <linux/config.h>
+#include <asm/ptrace.h>
+#include <asm/psr.h>
+
+ .section .sched.text
+ .align 4
+
+ .globl ___down_read
+___down_read:
+ rd %psr, %g3
+ nop
+ nop
+ nop
+ or %g3, PSR_PIL, %g7
+ wr %g7, 0, %psr
+ nop
+ nop
+ nop
+#ifdef CONFIG_SMP
+1: ldstub [%g1 + 4], %g7
+ tst %g7
+ bne 1b
+ ld [%g1], %g7
+ sub %g7, 1, %g7
+ st %g7, [%g1]
+ stb %g0, [%g1 + 4]
+#else
+ ld [%g1], %g7
+ sub %g7, 1, %g7
+ st %g7, [%g1]
+#endif
+ wr %g3, 0, %psr
+ add %g7, 1, %g7
+ nop
+ nop
+ subcc %g7, 1, %g7
+ bneg 3f
+ nop
+2: jmpl %o7, %g0
+ mov %g4, %o7
+3: save %sp, -64, %sp
+ mov %g1, %l1
+ mov %g4, %l4
+ bcs 4f
+ mov %g5, %l5
+ call down_read_failed
+ mov %l1, %o0
+ mov %l1, %g1
+ mov %l4, %g4
+ ba ___down_read
+ restore %l5, %g0, %g5
+4: call down_read_failed_biased
+ mov %l1, %o0
+ mov %l1, %g1
+ mov %l4, %g4
+ ba 2b
+ restore %l5, %g0, %g5
+
+ .globl ___down_write
+___down_write:
+ rd %psr, %g3
+ nop
+ nop
+ nop
+ or %g3, PSR_PIL, %g7
+ wr %g7, 0, %psr
+ sethi %hi(0x01000000), %g2
+ nop
+ nop
+#ifdef CONFIG_SMP
+1: ldstub [%g1 + 4], %g7
+ tst %g7
+ bne 1b
+ ld [%g1], %g7
+ sub %g7, %g2, %g7
+ st %g7, [%g1]
+ stb %g0, [%g1 + 4]
+#else
+ ld [%g1], %g7
+ sub %g7, %g2, %g7
+ st %g7, [%g1]
+#endif
+ wr %g3, 0, %psr
+ add %g7, %g2, %g7
+ nop
+ nop
+ subcc %g7, %g2, %g7
+ bne 3f
+ nop
+2: jmpl %o7, %g0
+ mov %g4, %o7
+3: save %sp, -64, %sp
+ mov %g1, %l1
+ mov %g4, %l4
+ bcs 4f
+ mov %g5, %l5
+ call down_write_failed
+ mov %l1, %o0
+ mov %l1, %g1
+ mov %l4, %g4
+ ba ___down_write
+ restore %l5, %g0, %g5
+4: call down_write_failed_biased
+ mov %l1, %o0
+ mov %l1, %g1
+ mov %l4, %g4
+ ba 2b
+ restore %l5, %g0, %g5
+
+ .text
+ .globl ___up_read
+___up_read:
+ rd %psr, %g3
+ nop
+ nop
+ nop
+ or %g3, PSR_PIL, %g7
+ wr %g7, 0, %psr
+ nop
+ nop
+ nop
+#ifdef CONFIG_SMP
+1: ldstub [%g1 + 4], %g7
+ tst %g7
+ bne 1b
+ ld [%g1], %g7
+ add %g7, 1, %g7
+ st %g7, [%g1]
+ stb %g0, [%g1 + 4]
+#else
+ ld [%g1], %g7
+ add %g7, 1, %g7
+ st %g7, [%g1]
+#endif
+ wr %g3, 0, %psr
+ nop
+ nop
+ nop
+ cmp %g7, 0
+ be 3f
+ nop
+2: jmpl %o7, %g0
+ mov %g4, %o7
+3: save %sp, -64, %sp
+ mov %g1, %l1
+ mov %g4, %l4
+ mov %g5, %l5
+ clr %o1
+ call __rwsem_wake
+ mov %l1, %o0
+ mov %l1, %g1
+ mov %l4, %g4
+ ba 2b
+ restore %l5, %g0, %g5
+
+ .globl ___up_write
+___up_write:
+ rd %psr, %g3
+ nop
+ nop
+ nop
+ or %g3, PSR_PIL, %g7
+ wr %g7, 0, %psr
+ sethi %hi(0x01000000), %g2
+ nop
+ nop
+#ifdef CONFIG_SMP
+1: ldstub [%g1 + 4], %g7
+ tst %g7
+ bne 1b
+ ld [%g1], %g7
+ add %g7, %g2, %g7
+ st %g7, [%g1]
+ stb %g0, [%g1 + 4]
+#else
+ ld [%g1], %g7
+ add %g7, %g2, %g7
+ st %g7, [%g1]
+#endif
+ wr %g3, 0, %psr
+ sub %g7, %g2, %g7
+ nop
+ nop
+ addcc %g7, %g2, %g7
+ bcs 3f
+ nop
+2: jmpl %o7, %g0
+ mov %g4, %o7
+3: save %sp, -64, %sp
+ mov %g1, %l1
+ mov %g4, %l4
+ mov %g5, %l5
+ mov %g7, %o1
+ call __rwsem_wake
+ mov %l1, %o0
+ mov %l1, %g1
+ mov %l4, %g4
+ ba 2b
+ restore %l5, %g0, %g5