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cpg: restore overclock settings when leaving

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Lephe 2022-05-16 20:12:55 +01:00
parent b942bc5d19
commit 291c3cef17
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GPG key ID: 1BBA026E13FC0495
4 changed files with 105 additions and 47 deletions
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21
include/gint/clock.h
View file

@ -143,6 +143,27 @@ void sleep_us_spin(uint64_t delay_us);
/* sleep_ms(): Sleep for a fixed duration in milliseconds */
#define sleep_ms(delay_ms) sleep_us((delay_ms) * 1000ull)
//---
// Low-level overclock functions
//
// These low-level functions directly read or write registers involved in
// setting the overclock level. Don't use them directly unless you understand
// how their interactions with the environment; instead, use clock_set_speed().
//---
struct cpg_overclock_setting
{
uint32_t FLLFRQ, FRQCR;
uint32_t CS0BCR, CS2BCR, CS3BCR, CS5aBCR;
uint32_t CS0WCR, CS2WCR, CS3WCR, CS5aWCR;
};
/* Queries the clock setting from the hardware. */
void cpg_get_overclock_setting(struct cpg_overclock_setting *s);
/* Applies the specified overclock setting. */
void cpg_set_overclock_setting(struct cpg_overclock_setting const *s);
#ifdef __cplusplus
}
#endif

2
include/gint/drivers/states.h
View file

@ -14,10 +14,12 @@ extern "C" {
#endif
#include <gint/mpu/dma.h>
#include <gint/clock.h>
/* Clock Pulse Generator (see cpg/cpg.c) */
typedef struct {
uint32_t SSCGCR;
struct cpg_overclock_setting speed;
} cpg_state_t;
/* CPU (see cpu/cpu.c) */

10
src/cpg/cpg.c
View file

@ -147,12 +147,18 @@ static void configure(void)
static void hsave(cpg_state_t *s)
{
if(isSH4()) s->SSCGCR = SH7305_CPG.SSCGCR.lword;
if(isSH4()) {
s->SSCGCR = SH7305_CPG.SSCGCR.lword;
cpg_get_overclock_setting(&s->speed);
}
}
static void hrestore(cpg_state_t const *s)
{
if(isSH4()) SH7305_CPG.SSCGCR.lword = s->SSCGCR;
if(isSH4()) {
SH7305_CPG.SSCGCR.lword = s->SSCGCR;
cpg_set_overclock_setting(&s->speed);
}
}
gint_driver_t drv_cpg = {

119
src/cpg/overclock.c
View file

@ -15,11 +15,75 @@
#include <gint/mpu/cpg.h>
#include <gint/mpu/bsc.h>
#ifdef FXCG50
#define CPG SH7305_CPG
#define BSC SH7305_BSC
//---
// Low-level clock speed access
//---
#define SDMR3_CL2 ((volatile uint8_t *)0xFEC15040)
#define SDMR3_CL3 ((volatile uint8_t *)0xFEC15060)
void cpg_get_overclock_setting(struct cpg_overclock_setting *s)
{
if(!isSH4())
return;
s->FLLFRQ = CPG.FLLFRQ.lword;
s->FRQCR = CPG.FRQCR.lword;
s->CS0BCR = BSC.CS0BCR.lword;
s->CS0WCR = BSC.CS0WCR.lword;
s->CS2BCR = BSC.CS2BCR.lword;
s->CS2WCR = BSC.CS2WCR.lword;
if(gint[HWCALC] == HWCALC_FXCG50) {
s->CS3BCR = BSC.CS3BCR.lword;
s->CS3WCR = BSC.CS3WCR.lword;
}
s->CS5aBCR = BSC.CS5ABCR.lword;
s->CS5aWCR = BSC.CS5AWCR.lword;
}
void cpg_set_overclock_setting(struct cpg_overclock_setting const *s)
{
if(!isSH4())
return;
BSC.CS0WCR.WR = 11; /* 18 cycles */
CPG.FLLFRQ.lword = s->FLLFRQ;
CPG.FRQCR.lword = s->FRQCR;
CPG.FRQCR.KICK = 1;
while(CPG.LSTATS != 0) {}
BSC.CS0BCR.lword = s->CS0BCR;
BSC.CS0WCR.lword = s->CS0WCR;
BSC.CS2BCR.lword = s->CS2BCR;
BSC.CS2WCR.lword = s->CS2WCR;
if(gint[HWCALC] == HWCALC_FXCG50) {
BSC.CS3BCR.lword = s->CS3BCR;
BSC.CS3WCR.lword = s->CS3WCR;
if(BSC.CS3WCR.A3CL == 1)
*SDMR3_CL2 = 0;
else
*SDMR3_CL3 = 0;
}
BSC.CS5ABCR.lword = s->CS5aBCR;
BSC.CS5AWCR.lword = s->CS5aWCR;
}
//---
// Predefined clock speeds
//---
#ifdef FXCG50
#define PLL_32x 0b011111
#define PLL_26x 0b011001
#define PLL_16x 0b001111
@ -28,19 +92,8 @@
#define DIV_8 2
#define DIV_16 3
#define DIV_32 4
#define WAIT18 0b1011
struct overclock_setting
{
uint32_t FLLFRQ, FRQCR;
uint32_t CS0BCR, CS2BCR, CS3BCR, CS5aBCR;
uint32_t CS0WCR, CS2WCR, CS3WCR, CS5aWCR;
};
#define SDMR3_CL2 ((volatile uint8_t *)0xFEC15040)
#define SDMR3_CL3 ((volatile uint8_t *)0xFEC15060)
static struct overclock_setting settings_cg50[5] = {
static struct cpg_overclock_setting settings_cg50[5] = {
/* CLOCK_SPEED_F1 */
{ .FLLFRQ = 0x00004000 + 900,
.FRQCR = 0x0F011112,
@ -98,7 +151,7 @@ static struct overclock_setting settings_cg50[5] = {
.CS5aWCR = 0x000203C1 },
};
static struct overclock_setting settings_cg20[5] = {
static struct cpg_overclock_setting settings_cg20[5] = {
/* CLOCK_SPEED_F1 */
{ .FLLFRQ = 0x00004000 + 900,
.FRQCR = 0x0F102203,
@ -146,7 +199,7 @@ static struct overclock_setting settings_cg20[5] = {
.CS5aWCR = 0x00010240 },
};
static struct overclock_setting *get_settings(void)
static struct cpg_overclock_setting *get_settings(void)
{
if(gint[HWCALC] == HWCALC_FXCG50)
return settings_cg50;
@ -157,12 +210,12 @@ static struct overclock_setting *get_settings(void)
int clock_get_speed(void)
{
struct overclock_setting *settings = get_settings();
struct cpg_overclock_setting *settings = get_settings();
if(!settings)
return CLOCK_SPEED_UNKNOWN;
for(int i = 0; i < 5; i++) {
struct overclock_setting *s = &settings[i];
struct cpg_overclock_setting *s = &settings[i];
if(CPG.FLLFRQ.lword == s->FLLFRQ
&& CPG.FRQCR.lword == s->FRQCR
@ -187,11 +240,11 @@ void clock_set_speed(int level)
if(clock_get_speed() == level)
return;
struct overclock_setting *settings = get_settings();
struct cpg_overclock_setting *settings = get_settings();
if(!settings)
return;
struct overclock_setting *s = &settings[level - CLOCK_SPEED_F1];
struct cpg_overclock_setting *s = &settings[level - CLOCK_SPEED_F1];
uint32_t old_Pphi = clock_freq()->Pphi_f;
/* Wait for asynchronous tasks to complete */
@ -201,31 +254,7 @@ void clock_set_speed(int level)
cpu_atomic_start();
/* Set the clock settings */
BSC.CS0WCR.WR = WAIT18;
CPG.FLLFRQ.lword = s->FLLFRQ;
CPG.FRQCR.lword = s->FRQCR;
CPG.FRQCR.KICK = 1;
while(CPG.LSTATS != 0) {}
BSC.CS0BCR.lword = s->CS0BCR;
BSC.CS0WCR.lword = s->CS0WCR;
BSC.CS2BCR.lword = s->CS2BCR;
BSC.CS2WCR.lword = s->CS2WCR;
if(gint[HWCALC] == HWCALC_FXCG50) {
BSC.CS3BCR.lword = s->CS3BCR;
BSC.CS3WCR.lword = s->CS3WCR;
if(BSC.CS3WCR.A3CL == 1)
*SDMR3_CL2 = 0;
else
*SDMR3_CL3 = 0;
}
BSC.CS5ABCR.lword = s->CS5aBCR;
BSC.CS5AWCR.lword = s->CS5aWCR;
cpg_set_overclock_setting(s);
/* Determine the change in frequency for Pϕ and recompute CPG data */
cpg_compute_freq();