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target/alpha: Extract clk_helper.c from sys_helper.c

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Except helper_load_pcc(), all helpers from sys_helper.c
are system-emulation specific. In preparation of restricting
sys_helper.c to system emulation, extract helper_load_pcc()
to clk_helper.c.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20231207105426.49339-2-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2023-12-07 11:45:49 +01:00
parent fe5c4adca9
commit 0180444806
3 changed files with 33 additions and 15 deletions
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32
target/alpha/clk_helper.c Normal file
View file

@ -0,0 +1,32 @@
/*
* QEMU Alpha clock helpers.
*
* Copyright (c) 2007 Jocelyn Mayer
*
* SPDX-License-Identifier: LGPL-2.1-or-later
*/
#include "qemu/osdep.h"
#include "qemu/timer.h"
#include "exec/helper-proto.h"
#include "cpu.h"
uint64_t helper_load_pcc(CPUAlphaState *env)
{
#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_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2));
#else
/*
* In user-mode, QEMU_CLOCK_VIRTUAL 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_host_ticks();
#endif
}

1
target/alpha/meson.build
View file

@ -4,6 +4,7 @@ alpha_ss.add(files(
'fpu_helper.c', 'fpu_helper.c',
'gdbstub.c', 'gdbstub.c',
'helper.c', 'helper.c',
'clk_helper.c',
'int_helper.c', 'int_helper.c',
'mem_helper.c', 'mem_helper.c',
'sys_helper.c', 'sys_helper.c',

15
target/alpha/sys_helper.c
View file

@ -27,21 +27,6 @@
#include "qemu/timer.h" #include "qemu/timer.h"
uint64_t helper_load_pcc(CPUAlphaState *env)
{
#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_clock_get_ns(QEMU_CLOCK_VIRTUAL) >> 2));
#else
/* In user-mode, QEMU_CLOCK_VIRTUAL 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_host_ticks();
#endif
}
/* PALcode support special instructions */ /* PALcode support special instructions */
#ifndef CONFIG_USER_ONLY #ifndef CONFIG_USER_ONLY
void helper_tbia(CPUAlphaState *env) void helper_tbia(CPUAlphaState *env)