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blackfin: bf60x: pm: Add a debug option to calculate kernel wakeup time.

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Display the total time when kernel resumes normal from standby or suspend to mem
mode.

Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>
Signed-off-by: Bob Liu <lliubbo@gmail.com>
This commit is contained in:
Sonic Zhang 2012-05-17 17:33:00 +08:00 committed by Bob Liu
parent 0fbd88ca20
commit 72b099ed93
6 changed files with 74 additions and 0 deletions
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7
arch/blackfin/Kconfig.debug
View File

@ -253,4 +253,11 @@ config BFIN_PSEUDODBG_INSNS
Most people should say N here.
config BFIN_PM_WAKEUP_TIME_BENCH
bool "Display the total time for kernel to resume from power saving mode"
default n
help
Display the total time when kernel resumes normal from standby or
suspend to mem mode.
endmenu

14
arch/blackfin/include/asm/dpmc.h
View File

@ -53,6 +53,16 @@
#define PM_SYS_PUSH16(n, x) _PM_PUSH(n, x, w, SYSMMR_BASE)
#define PM_SYS_POP16(n, x) _PM_POP(n, x, w, SYSMMR_BASE)
.macro bfin_init_pm_bench_cycles
#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
R4 = 0;
CYCLES = R4;
CYCLES2 = R4;
R4 = SYSCFG;
BITSET(R4, 1);
SYSCFG = R4;
#endif
.endm
.macro bfin_cpu_reg_save
/*
@ -98,8 +108,10 @@
r7 = RETI;
[--sp] = RETS;
[--sp] = ASTAT;
#ifndef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
[--sp] = CYCLES;
[--sp] = CYCLES2;
#endif
[--sp] = SYSCFG;
[--sp] = RETX;
[--sp] = SEQSTAT;
@ -115,8 +127,10 @@
SEQSTAT = [sp++];
RETX = [sp++];
SYSCFG = [sp++];
#ifndef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
CYCLES2 = [sp++];
CYCLES = [sp++];
#endif
ASTAT = [sp++];
RETS = [sp++];

3
arch/blackfin/mach-bf609/hibernate.S
View File

@ -24,6 +24,9 @@ ENTRY(_enter_hibernate)
P0.L = LO(DPM0_CTL);
R3.H = HI(0x00000010);
R3.L = LO(0x00000010);
bfin_init_pm_bench_cycles;
[P0] = R3;
SSYNC;

12
arch/blackfin/mach-bf609/pm.c
View File

@ -147,6 +147,18 @@ void bfin_deepsleep(unsigned long mask)
"idle;" \
: : \
);
#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
__asm__ __volatile__(
"%0 = 0;"
"CYCLES = %0;"
"CYCLES2 = %0;"
"%0 = SYSCFG;"
"BITSET(%0, 1);"
"SYSCFG = %0;"
: "=d,a" (dpm0_ctl) :
);
#endif
}
__attribute__((l1_text))

8
arch/blackfin/mach-common/dpmc_modes.S
View File

@ -42,6 +42,9 @@ ENTRY(_sleep_mode)
BITCLR (R7, 5);
w[p0] = R7.L;
IDLE;
bfin_init_pm_bench_cycles;
call _test_pll_locked;
RETS = [SP++];
@ -74,6 +77,9 @@ ENTRY(_hibernate_mode)
/* Finally, we climb into our cave to hibernate */
W[P3] = R4.L;
bfin_init_pm_bench_cycles;
CLI R2;
IDLE;
.Lforever:
@ -158,6 +164,8 @@ ENTRY(_sleep_deeper)
SSYNC;
IDLE;
bfin_init_pm_bench_cycles;
call _test_pll_locked;
P0.H = hi(PLL_DIV);

30
arch/blackfin/mach-common/pm.c
View File

@ -247,9 +247,39 @@ static int bfin_pm_enter(suspend_state_t state)
return 0;
}
#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
void bfin_pm_end(void)
{
u32 cycle, cycle2;
u64 usec64;
u32 usec;
__asm__ __volatile__ (
"1: %0 = CYCLES2\n"
"%1 = CYCLES\n"
"%2 = CYCLES2\n"
"CC = %2 == %0\n"
"if ! CC jump 1b\n"
: "=d,a" (cycle2), "=d,a" (cycle), "=d,a" (usec) : : "CC"
);
usec64 = ((u64)cycle2 << 32) + cycle;
do_div(usec64, get_cclk() / USEC_PER_SEC);
usec = usec64;
if (usec == 0)
usec = 1;
pr_info("PM: resume of kernel completes after %ld msec %03ld usec\n",
usec / USEC_PER_MSEC, usec % USEC_PER_MSEC);
}
#endif
static const struct platform_suspend_ops bfin_pm_ops = {
.enter = bfin_pm_enter,
.valid = bfin_pm_valid,
#ifdef CONFIG_BFIN_PM_WAKEUP_TIME_BENCH
.end = bfin_pm_end,
#endif
};
static int __init bfin_pm_init(void)