A significant rework that builds an array of 'struct spr', where each
element describes an SPR. This makes various metadata about the SPR
like name and access type easier to carry and use.
Hypervisor privileged registers are described despite not being used
at the moment for completeness, but also the code might one day be
reused for a hypervisor-privileged test.
Acked-by: Thomas Huth
Signed-off-by: Nicholas Piggin
---
lib/powerpc/asm/reg.h | 2 +
powerpc/sprs.c| 647 +-
2 files changed, 457 insertions(+), 192 deletions(-)
diff --git a/lib/powerpc/asm/reg.h b/lib/powerpc/asm/reg.h
index 6810c1d82..1f991288e 100644
--- a/lib/powerpc/asm/reg.h
+++ b/lib/powerpc/asm/reg.h
@@ -5,6 +5,8 @@
#define UL(x) _AC(x, UL)
+#define SPR_SRR0 0x01a
+#define SPR_SRR1 0x01b
#define SPR_TB 0x10c
#define SPR_SPRG0 0x110
#define SPR_SPRG1 0x111
diff --git a/powerpc/sprs.c b/powerpc/sprs.c
index a19d80a1a..44edd0d7b 100644
--- a/powerpc/sprs.c
+++ b/powerpc/sprs.c
@@ -30,229 +30,458 @@
#include
#include
-uint64_t before[1024], after[1024];
-
-/* Common SPRs for all PowerPC CPUs */
-static void set_sprs_common(uint64_t val)
+/* "Indirect" mfspr/mtspr which accept a non-constant spr number */
+static uint64_t __mfspr(unsigned spr)
{
- mtspr(9, val); /* CTR */
- // mtspr(273, val); /* SPRG1 */ /* Used by our exception handler */
- mtspr(274, val);/* SPRG2 */
- mtspr(275, val);/* SPRG3 */
+ uint64_t tmp;
+ uint64_t ret;
+
+ asm volatile(
+" bcl 20, 31, 1f \n"
+"1:mflr%0 \n"
+" addi%0, %0, (2f-1b) \n"
+" add %0, %0, %2 \n"
+" mtctr %0 \n"
+" bctr\n"
+"2:\n"
+".LSPR=0 \n"
+".rept 1024\n"
+" mfspr %1, .LSPR \n"
+" b 3f \n"
+" .LSPR=.LSPR+1 \n"
+".endr \n"
+"3:\n"
+ : "="(tmp),
+ "=r"(ret)
+ : "r"(spr*8) /* 8 bytes per 'mfspr ; b' block */
+ : "lr", "ctr");
+
+ return ret;
}
-/* SPRs from PowerPC Operating Environment Architecture, Book III, Vers. 2.01
*/
-static void set_sprs_book3s_201(uint64_t val)
+static void __mtspr(unsigned spr, uint64_t val)
{
- mtspr(18, val); /* DSISR */
- mtspr(19, val); /* DAR */
- mtspr(152, val);/* CTRL */
- mtspr(256, val);/* VRSAVE */
- mtspr(786, val);/* MMCRA */
- mtspr(795, val);/* MMCR0 */
- mtspr(798, val);/* MMCR1 */
+ uint64_t tmp;
+
+ asm volatile(
+" bcl 20, 31, 1f \n"
+"1:mflr%0 \n"
+" addi%0, %0, (2f-1b) \n"
+" add %0, %0, %2 \n"
+" mtctr %0 \n"
+" bctr\n"
+"2:\n"
+".LSPR=0 \n"
+".rept 1024\n"
+" mtspr .LSPR, %1 \n"
+" b 3f \n"
+" .LSPR=.LSPR+1 \n"
+".endr \n"
+"3:\n"
+ : "="(tmp)
+ : "r"(val),
+ "r"(spr*8) /* 8 bytes per 'mfspr ; b' block */
+ : "lr", "ctr", "xer");
}
+static uint64_t before[1024], after[1024];
+
+#define SPR_PR_READ0x0001
+#define SPR_PR_WRITE 0x0002
+#define SPR_OS_READ0x0010
+#define SPR_OS_WRITE 0x0020
+#define SPR_HV_READ0x0100
+#define SPR_HV_WRITE 0x0200
+
+#define RW 0x333
+#define RO 0x111
+#define WO 0x222
+#define OS_RW 0x330
+#define OS_RO 0x110
+#define OS_WO 0x220
+#define HV_RW 0x300
+#define HV_RO 0x100
+#define HV_WO 0x200
+
+#define SPR_ASYNC 0x1000 /* May be updated asynchronously */
+#define SPR_INT0x2000 /* May be updated by synchronous
interrupt */
+#define SPR_HARNESS0x4000 /* Test harness uses the register */
+
+struct spr {
+ const char *name;
+ uint8_t width;
+ uint16_taccess;
+ uint16_ttype;
+};
+
+/* SPRs common denominator back to PowerPC Operating Environment Architecture
*/
+static const struct spr sprs_common[1024] = {
+ [1] = { "XER", 64, RW, SPR_HARNESS, }, /* Used by
compiler */
+ [8] = { "LR",64, RW, SPR_HARNESS, }, /* Compiler,
mfspr/mtspr */
+ [9] = { "CTR", 64, RW, SPR_HARNESS, }, /* Compiler,
mfspr/mtspr */
+ [18] = { "DSISR", 32, OS_RW, SPR_INT, },
+
