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[Qemu-devel] [PATCH 25/26] target-alpha: Use a fixed frequency for the R
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 25/26] target-alpha: Use a fixed frequency for the RPCC in system mode. |
Date: |
Mon, 23 May 2011 13:28:45 -0700 |
Also include the PCC_OFS in the return value. For user mode we
can pretend the PCC_OFS value is always zero.
Signed-off-by: Richard Henderson <address@hidden>
---
target-alpha/op_helper.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/target-alpha/op_helper.c b/target-alpha/op_helper.c
index 91ef90a..36b8289 100644
--- a/target-alpha/op_helper.c
+++ b/target-alpha/op_helper.c
@@ -65,8 +65,17 @@ static void QEMU_NORETURN arith_excp(int exc, uint64_t mask)
uint64_t helper_load_pcc (void)
{
- /* ??? This isn't a timer for which we have any rate info. */
+#ifndef CONFIG_USER_ONLY
+ /* In system mode we have access to a decent high-resolution clock.
+ In order to make OS-level time accounting work with the RPCC,
+ present it with a well-timed clock fixed at 250MHz. */
+ return (((uint64_t)env->pcc_ofs << 32)
+ | (uint32_t)(qemu_get_clock_ns(vm_clock) >> 2));
+#else
+ /* In user-mode, vm_clock doesn't exist. Just pass through the host cpu
+ clock ticks. Also, don't bother taking PCC_OFS into account. */
return (uint32_t)cpu_get_real_ticks();
+#endif
}
uint64_t helper_load_fpcr (void)
--
1.7.4.4
- [Qemu-devel] [PATCH 16/26] target-alpha: Add IPRs to be used by the emulation PALcode., (continued)
- [Qemu-devel] [PATCH 16/26] target-alpha: Add IPRs to be used by the emulation PALcode., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 17/26] target-alpha: Implement do_interrupt for system mode., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 11/26] target-alpha: Tidy exception constants., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 18/26] target-alpha: Swap shadow registers moving to/from PALmode., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 20/26] target-alpha: Disable interrupts properly., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 19/26] target-alpha: All ISA checks to use TB->FLAGS., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 21/26] target-alpha: Implement more CALL_PAL values inline., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 22/26] target-alpha: Implement cpu_alpha_handle_mmu_fault for system mode., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 23/26] target-alpha: Remap PIO space for 43-bit KSEG for EV6., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 24/26] target-alpha: Trap for unassigned and unaligned addresses., Richard Henderson, 2011/05/23
- [Qemu-devel] [PATCH 25/26] target-alpha: Use a fixed frequency for the RPCC in system mode.,
Richard Henderson <=
- [Qemu-devel] [PATCH 26/26] target-alpha: Implement TLB flush primitives., Richard Henderson, 2011/05/23
- Re: [Qemu-devel] [PULL 00/26] Alpha system emulation, v5, Richard Henderson, 2011/05/27