powerpc: Introduce VSX thread_struct and CONFIG_VSX

[linux-2.6] / include / asm-powerpc / processor.h

diff --git a/include/asm-powerpc/processor.h b/include/asm-powerpc/processor.h
index cf83f2d7e2a5dea90b550861b3b0502c54853551..e93e72df4bca2208939de346f12baf3d56e49809 100644 (file)
--- a/include/asm-powerpc/processor.h
+++ b/include/asm-powerpc/processor.h
@@ -12,6 +12,12 @@
 
 #include <asm/reg.h>
 
+#ifdef CONFIG_VSX
+#define TS_FPRWIDTH 2
+#else
+#define TS_FPRWIDTH 1
+#endif
+
 #ifndef __ASSEMBLY__
 #include <linux/compiler.h>
 #include <asm/ptrace.h>
@@ -78,9 +84,14 @@ extern long kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
 /* Lazy FPU handling on uni-processor */
 extern struct task_struct *last_task_used_math;
 extern struct task_struct *last_task_used_altivec;
+extern struct task_struct *last_task_used_vsx;
 extern struct task_struct *last_task_used_spe;
 
 #ifdef CONFIG_PPC32
+
+#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
+#error User TASK_SIZE overlaps with KERNEL_START address
+#endif
 #define TASK_SIZE      (CONFIG_TASK_SIZE)
 
 /* This decides where the kernel will search for a free chunk of vm
@@ -136,6 +147,10 @@ typedef struct {
        unsigned long seg;
 } mm_segment_t;
 
+#define TS_FPROFFSET 0
+#define TS_VSRLOWOFFSET 1
+#define TS_FPR(i) fpr[i][TS_FPROFFSET]
+
 struct thread_struct {
        unsigned long   ksp;            /* Kernel stack pointer */
        unsigned long   ksp_limit;      /* if ksp <= ksp_limit stack overflow */
@@ -152,8 +167,9 @@ struct thread_struct {
        unsigned long   dbcr0;          /* debug control register values */
        unsigned long   dbcr1;
 #endif
-       double          fpr[32];        /* Complete floating point set */
-       struct {                        /* fpr ... fpscr must be contiguous */
+       /* FP and VSX 0-31 register set */
+       double          fpr[32][TS_FPRWIDTH];
+       struct {
 
                unsigned int pad;
                unsigned int val;       /* Floating point status */
@@ -173,6 +189,10 @@ struct thread_struct {
        unsigned long   vrsave;
        int             used_vr;        /* set if process has used altivec */
 #endif /* CONFIG_ALTIVEC */
+#ifdef CONFIG_VSX
+       /* VSR status */
+       int             used_vsr;       /* set if process has used altivec */
+#endif /* CONFIG_VSX */
 #ifdef CONFIG_SPE
        unsigned long   evr[32];        /* upper 32-bits of SPE regs */
        u64             acc;            /* Accumulator */