#include <sbi/sbi_types.h>
+/** Hart state managment device */
+struct sbi_hsm_device {
+ /** Name of the hart state managment device */
+ char name[32];
+
+ /** Start (or power-up) the given hart */
+ int (*hart_start)(u32 hartid, ulong saddr);
+
+ /**
+ * Stop (or power-down) the current hart from running. This call
+ * doesn't expect to return if success.
+ */
+ int (*hart_stop)(void);
+
+ /**
+ * Put the current hart in platform specific suspend (or low-power)
+ * state.
+ *
+ * For successful retentive suspend, the call will return 0 when
+ * the hart resumes normal execution.
+ *
+ * For successful non-retentive suspend, the hart will resume from
+ * specified resume address
+ */
+ int (*hart_suspend)(u32 suspend_type, ulong raddr);
+};
+
struct sbi_domain;
struct sbi_scratch;
+const struct sbi_hsm_device *sbi_hsm_get_device(void);
+
+void sbi_hsm_set_device(const struct sbi_hsm_device *dev);
+
int sbi_hsm_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot);
void __noreturn sbi_hsm_exit(struct sbi_scratch *scratch);
/** Possible feature flags of a platform */
enum sbi_platform_features {
- /** Platform has HART hotplug support */
- SBI_PLATFORM_HAS_HART_HOTPLUG = (1 << 0),
/** Platform has fault delegation support */
SBI_PLATFORM_HAS_MFAULTS_DELEGATION = (1 << 1),
- /** Platform has custom secondary hart booting support */
- SBI_PLATFORM_HAS_HART_SECONDARY_BOOT = (1 << 2),
/** Last index of Platform features*/
- SBI_PLATFORM_HAS_LAST_FEATURE = SBI_PLATFORM_HAS_HART_SECONDARY_BOOT,
+ SBI_PLATFORM_HAS_LAST_FEATURE = SBI_PLATFORM_HAS_MFAULTS_DELEGATION,
};
/** Default feature set for a platform */
/** Exit platform timer for current HART */
void (*timer_exit)(void);
- /** Bringup the given hart */
- int (*hart_start)(u32 hartid, ulong saddr);
- /**
- * Stop the current hart from running. This call doesn't expect to
- * return if success.
- */
- int (*hart_stop)(void);
- /**
- * Put the current hart in platform specific suspend (or low-power)
- * state.
- */
- int (*hart_suspend)(u32 suspend_type, ulong raddr);
-
/** platform specific SBI extension implementation probe function */
int (*vendor_ext_check)(long extid);
/** platform specific SBI extension implementation provider */
#define sbi_platform_ops(__p) \
((const struct sbi_platform_operations *)(__p)->platform_ops_addr)
-/** Check whether the platform supports HART hotplug */
-#define sbi_platform_has_hart_hotplug(__p) \
- ((__p)->features & SBI_PLATFORM_HAS_HART_HOTPLUG)
/** Check whether the platform supports fault delegation */
#define sbi_platform_has_mfaults_delegation(__p) \
((__p)->features & SBI_PLATFORM_HAS_MFAULTS_DELEGATION)
-/** Check whether the platform supports custom secondary hart booting support */
-#define sbi_platform_has_hart_secondary_boot(__p) \
- ((__p)->features & SBI_PLATFORM_HAS_HART_SECONDARY_BOOT)
/**
* Get HART index for the given HART
}
/**
- * Bringup a given hart from previous stage. Platform should implement this
- * operation if they support a custom mechanism to start a hart. Otherwise,
- * a generic WFI based approach will be used to start/stop a hart in OpenSBI.
- *
- * @param plat pointer to struct sbi_platform
- * @param hartid HART id
- * @param saddr M-mode start physical address for the HART
- *
- * @return 0 if sucessful and negative error code on failure
- */
-static inline int sbi_platform_hart_start(const struct sbi_platform *plat,
- u32 hartid, ulong saddr)
-{
- if (plat && sbi_platform_ops(plat)->hart_start)
- return sbi_platform_ops(plat)->hart_start(hartid, saddr);
- return SBI_ENOTSUPP;
-}
-
-/**
- * Stop the current hart in OpenSBI.
- *
- * @param plat pointer to struct sbi_platform
- *
- * @return Negative error code on failure. It doesn't return on success.
- */
-static inline int sbi_platform_hart_stop(const struct sbi_platform *plat)
-{
- if (plat && sbi_platform_ops(plat)->hart_stop)
- return sbi_platform_ops(plat)->hart_stop();
- return SBI_ENOTSUPP;
-}
-
-/**
- * Put the current hart in platform specific suspend (or low-power) state.
- *
- * For successful retentive suspend, the call will return 0 when the hart
- * resumes normal execution.
- *
- * For successful non-retentive suspend, the hart will resume from specified
- * resume address
- *
- * @param plat pointer to struct sbi_platform
- * @param suspend_type the type of suspend
- * @param raddr physical address where the hart can resume in M-mode after
- * non-retantive suspend
- *
- * @return 0 if successful and negative error code on failure
- */
-static inline int sbi_platform_hart_suspend(const struct sbi_platform *plat,
- u32 suspend_type, ulong raddr)
-{
- if (plat && sbi_platform_ops(plat)->hart_suspend)
- return sbi_platform_ops(plat)->hart_suspend(suspend_type,
- raddr);
- return SBI_ENOTSUPP;
-}
-
-/**
* Early initialization for current HART
*
* @param plat pointer to struct sbi_platform
#include <sbi/sbi_hsm.h>
#include <sbi/sbi_init.h>
#include <sbi/sbi_ipi.h>
-#include <sbi/sbi_platform.h>
+#include <sbi/sbi_scratch.h>
#include <sbi/sbi_system.h>
#include <sbi/sbi_timer.h>
#include <sbi/sbi_console.h>
+static const struct sbi_hsm_device *hsm_dev = NULL;
static unsigned long hart_data_offset;
/** Per hart specific data to manage state transition **/
*/
}
+const struct sbi_hsm_device *sbi_hsm_get_device(void)
+{
+ return hsm_dev;
+}
+
+void sbi_hsm_set_device(const struct sbi_hsm_device *dev)
+{
+ if (!dev || hsm_dev)
+ return;
+
+ hsm_dev = dev;
+}
+
+static bool hsm_device_has_hart_hotplug(void)
+{
+ if (hsm_dev && hsm_dev->hart_start && hsm_dev->hart_stop)
+ return true;
+ return false;
+}
+
+static bool hsm_device_has_hart_secondary_boot(void)
+{
+ if (hsm_dev && hsm_dev->hart_start && !hsm_dev->hart_stop)
+ return true;
+ return false;
+}
+
+static int hsm_device_hart_start(u32 hartid, ulong saddr)
+{
+ if (hsm_dev && hsm_dev->hart_start)
+ return hsm_dev->hart_start(hartid, saddr);
+ return SBI_ENOTSUPP;
+}
+
+static int hsm_device_hart_stop(void)
+{
+ if (hsm_dev && hsm_dev->hart_stop)
+ return hsm_dev->hart_stop();
+ return SBI_ENOTSUPP;
+}
+
+static int hsm_device_hart_suspend(u32 suspend_type, ulong raddr)
+{
+ if (hsm_dev && hsm_dev->hart_suspend)
+ return hsm_dev->hart_suspend(suspend_type, raddr);
+ return SBI_ENOTSUPP;
+}
+
int sbi_hsm_init(struct sbi_scratch *scratch, u32 hartid, bool cold_boot)
{
u32 i;
void __noreturn sbi_hsm_exit(struct sbi_scratch *scratch)
{
u32 hstate;
- const struct sbi_platform *plat = sbi_platform_ptr(scratch);
struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch,
hart_data_offset);
void (*jump_warmboot)(void) = (void (*)(void))scratch->warmboot_addr;
if (hstate != SBI_HSM_STATE_STOP_PENDING)
goto fail_exit;
- if (sbi_platform_has_hart_hotplug(plat)) {
- sbi_platform_hart_stop(plat);
+ if (hsm_device_has_hart_hotplug()) {
+ hsm_device_hart_stop();
/* It should never reach here */
goto fail_exit;
}
unsigned int hstate;
struct sbi_scratch *rscratch;
struct sbi_hsm_data *hdata;
- const struct sbi_platform *plat = sbi_platform_ptr(scratch);
/* For now, we only allow start mode to be S-mode or U-mode. */
if (smode != PRV_S && smode != PRV_U)
rscratch->next_addr = saddr;
rscratch->next_mode = smode;
- if (sbi_platform_has_hart_hotplug(plat) ||
- (sbi_platform_has_hart_secondary_boot(plat) && !init_count)) {
- return sbi_platform_hart_start(plat, hartid,
- scratch->warmboot_addr);
+ if (hsm_device_has_hart_hotplug() ||
+ (hsm_device_has_hart_secondary_boot() && !init_count)) {
+ return hsm_device_hart_start(hartid, scratch->warmboot_addr);
} else {
sbi_ipi_raw_send(hartid);
}
{
int oldstate, ret;
const struct sbi_domain *dom = sbi_domain_thishart_ptr();
- const struct sbi_platform *plat = sbi_platform_ptr(scratch);
struct sbi_hsm_data *hdata = sbi_scratch_offset_ptr(scratch,
hart_data_offset);
hdata->suspend_type = suspend_type;
/* Try platform specific suspend */
- ret = sbi_platform_hart_suspend(plat, suspend_type,
- scratch->warmboot_addr);
+ ret = hsm_device_hart_suspend(suspend_type, scratch->warmboot_addr);
if (ret == SBI_ENOTSUPP) {
/* Try generic implementation of default suspend types */
if (suspend_type == SBI_HSM_SUSPEND_RET_DEFAULT) {
return NULL;
switch (feature) {
- case SBI_PLATFORM_HAS_HART_HOTPLUG:
- fstr = "hotplug";
- break;
case SBI_PLATFORM_HAS_MFAULTS_DELEGATION:
fstr = "mfdeleg";
break;
- case SBI_PLATFORM_HAS_HART_SECONDARY_BOOT:
- fstr = "sec_boot";
- break;
default:
break;
}
projects / platform / kernel / opensbi-spacemit.git / commitdiff