This commit is contained in:
2025-12-24 17:21:08 +09:00
parent a96323de19
commit 96dc62d8dc
2302 changed files with 455822 additions and 0 deletions

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#include <stdint.h>
#include <mem_io.h>
#include <scmt.h>
#include <scmt_config.h>
#include <scmt_register.h>
#if SCMT_DEBUG
#include <log.h>
#endif /* SCMT_DEBUG */
#if SCMT_TOGGLE_GPIO
#include <pfc.h>
void gpio_set(void)
{
/* V4H: SCL3_V::Pin AK5::GP8_06
GPIO Group 8 Base: HE606 8000
INOUTSELn +0x184 (set pin to output mode)
OUTDTn +0x188 (set pin output value)
*/
pfc_reg_write(PFC_INOUTSEL8_RW, 1<<6); /* Set GP8_06 to output mode */
pfc_reg_write(PFC_OUTDT8_RW, 1<<6); /* Set GP8_06 to 'high' */
}
static int gpio_reset_cnt = 3;
void gpio_clear(void)
{
if (gpio_reset_cnt>0) {
gpio_reset_cnt--;
}
else
{
pfc_reg_write(PFC_OUTDT8_RW, 0); /* Set GP8_06 to 'low' */
}
}
#endif /* SCMT_TOGGLE_GPIO */
void scmt_module_start(void)
{
/* For boot time measurement, signal start of SCMT by GPIO pin toggle */
#if SCMT_TOGGLE_GPIO
gpio_set();
#endif /* SCMT_TOGGLE_GPIO */
/* If you have issues with the code getting stuck or reading zero from the timer,
you can debug the init seqence with SCMT_DEBUG.
Just make sure that printing debug data is already possible. */
#if SCMT_DEBUG
PRINTFN("SCMT A\n");
#endif /* SCMT_DEBUG */
#if SCMT_INIT
mem_write32(SCMT_CMSCNT,(SCMT_START_VALUE)); /* Set counter value to zero */
#endif /* SCMT_INIT */
#if SCMT_DEBUG
PRINTFN("SCMT B: SCMT_CMSCNT (0x%x) = 0x%x\n", SCMT_CMSCNT, mem_read32(SCMT_CMSCNT) );
#endif /* SCMT_DEBUG */
#if SCMT_INIT
mem_write32(SCMT_CMSCOR,0xffffffff); /* Set compare value to maximum, we use it as 32-bit counter only */
#endif /* SCMT_INIT */
#if SCMT_DEBUG
PRINTFN("SCMT C: SCMT_CMSCOR (0x%x) = 0x%x\n", SCMT_CMSCOR, mem_read32(SCMT_CMSCOR) );
#endif /* SCMT_DEBUG */
#if SCMT_INIT
while(mem_read16(SCMT_CMSCSR)&(1<<13)); /* Wait for write clearance */
#endif /* SCMT_INIT */
#if SCMT_DEBUG
PRINTFN("SCMT D: SCMT_CMSCSR (0x%x) = 0x%x\n", SCMT_CMSCSR, mem_read16(SCMT_CMSCSR) );
#endif /* SCMT_DEBUG */
#if SCMT_INIT
mem_write16(SCMT_CMSSTR,1<<5); /* Start counter */
#endif /* SCMT_INIT */
#if SCMT_DEBUG
PRINTFN("SCMT E: SCMT_CMSSTR (0x%x) = 0x%x\n", SCMT_CMSSTR, mem_read16(SCMT_CMSSTR) );
PRINTFN("SCMT F: SCMT_CMSCNT (0x%x) = 0x%x\n", SCMT_CMSCNT, mem_read32(SCMT_CMSCNT) );
PRINTFN("SCMT G: SCMT_CMSCNT (0x%x) = 0x%x\n", SCMT_CMSCNT, mem_read32(SCMT_CMSCNT) );
PRINTFN("SCMT H: SCMT_CMSCNT (0x%x) = 0x%x\n", SCMT_CMSCNT, mem_read32(SCMT_CMSCNT) );
PRINTFN("SCMT I: SCMT_CMSCNT (0x%x) = 0x%x\n", SCMT_CMSCNT, mem_read32(SCMT_CMSCNT) );
#endif /* SCMT_DEBUG */
}
uint32_t scmt_module_read(void)
{
uint32_t last = 0, current = 0;
/* For boot time measurement, signal start of SCMT by GPIO pin toggle, reset after some time */
#if SCMT_TOGGLE_GPIO
gpio_clear();
#endif /* SCMT_TOGGLE_GPIO */
/* From UM:
When CMSCNT is read during the counter operation, the read value may be wrong because of an asynchronous clock between counter and bus-interface.
For exact value, read this register continuously, until same values are read from this register. */
current = mem_read32(SCMT_CMSCNT);
do {
last = current;
current = mem_read32(SCMT_CMSCNT);
} while (last != current);
return current;
}
/* NOT SAFE FOR OVERLFOWS */
void scmt_wait_ticks(uint32_t ticks)
{
uint32_t start = scmt_module_read();
uint32_t stop = start + ticks;
while (stop > scmt_module_read()) { /* NOP */ };
}