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[PULL,1/9] RISC-V: Update address bits to support sv39 and sv48

Message ID 20180904231442.18932-2-alistair.francis@wdc.com
State New
Headers show
Series riscv-pullreq queue | expand

Commit Message

Alistair Francis Sept. 4, 2018, 11:14 p.m. UTC 
From: Michael Clark <mjc@sifive.com>

Cc: Sagar Karandikar <sagark@eecs.berkeley.edu>
Cc: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Cc: Palmer Dabbelt <palmer@sifive.com>
Cc: Alistair Francis <Alistair.Francis@wdc.com>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
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Patch

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index 34abc383e3..e0608e6d5f 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -24,12 +24,12 @@ 
 #define TARGET_PAGE_BITS 12 /* 4 KiB Pages */
 #if defined(TARGET_RISCV64)
 #define TARGET_LONG_BITS 64
-#define TARGET_PHYS_ADDR_SPACE_BITS 50
-#define TARGET_VIRT_ADDR_SPACE_BITS 39
+#define TARGET_PHYS_ADDR_SPACE_BITS 56 /* 44-bit PPN */
+#define TARGET_VIRT_ADDR_SPACE_BITS 48 /* sv48 */
 #elif defined(TARGET_RISCV32)
 #define TARGET_LONG_BITS 32
-#define TARGET_PHYS_ADDR_SPACE_BITS 34
-#define TARGET_VIRT_ADDR_SPACE_BITS 32
+#define TARGET_PHYS_ADDR_SPACE_BITS 34 /* 22-bit PPN */
+#define TARGET_VIRT_ADDR_SPACE_BITS 32 /* sv32 */
 #endif
 
 #define TCG_GUEST_DEFAULT_MO 0