diff options
| author |   Meador Inge <meadori@codesourcery.com> | 2012-08-21 12:31:37 -0500 |
|---|---|---|
| committer |   Michael Roth <mdroth@linux.vnet.ibm.com> | 2012-08-28 01:50:02 -0500 |
| commit | 5ea33884f642ab74a321527d7a91001d1562d671 (patch) | |
| tree | 242a9cbb29e3d2bbe47758a39763cfa7fd0ef8b5 | |
| parent | 50d0184cb7be68a521a19073c92c5ffc6adb728f (diff) | |
target-mips: Enable access to required RDHWR hardware registers
While running in the usermode emulator all of the required*
MIPS32r2 RDHWR hardware registers should be accessible (the
Linux kernel enables access to these same registers). Note
that these registers are still enabled when the MIPS ISA is
not release 2. This is OK since the Linux kernel emulates
access to them when they are not available in hardware.
* There is also the ULR register which is only recommended
for full release 2 compliance. Incidentally, accessing
this register in the current implementation works fine
without flipping its access bit.
Signed-off-by: Meador Inge <meadori@codesourcery.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
(cherry picked from commit 94159135cb59684853dcd45ff70d6dbc54a29209)
Signed-off-by: Michael Roth <mdroth@linux.vnet.ibm.com>
| -rw-r--r-- | target-mips/translate.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/target-mips/translate.c b/target-mips/translate.c index 0c563eedf..7dd21f4f7 100644 --- a/target-mips/translate.c +++ b/target-mips/translate.c @@ -12767,8 +12767,9 @@ void cpu_state_reset(CPUMIPSState *env) #if defined(CONFIG_USER_ONLY) env->hflags = MIPS_HFLAG_UM; - /* Enable access to the SYNCI_Step register. */ - env->CP0_HWREna |= (1 << 1); + /* Enable access to the CPUNum, SYNCI_Step, CC, and CCRes RDHWR + hardware registers. */ + env->CP0_HWREna |= 0x0000000F; if (env->CP0_Config1 & (1 << CP0C1_FP)) { env->hflags |= MIPS_HFLAG_FPU; } |