Firmware/opensbi
8
0
Fork 0
forked from Mirrors/opensbi
Code Pull Requests Activity

lib: utils/irqchip: plic: Common PM save/restore

Browse Source 
Move the PLIC save/restore functions inside the driver, so they can be
reused on any platform that needs them. The memory needed to store the
PLIC context is also allocated by the driver. The PM data cannot be
completely encapsulated, as some platforms (including Allwinner D1) need
to program the IRQ enable status to a sideband interrupt controller for
wakeup capability.

Signed-off-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Samuel Holland
2024-11-04 20:10:05 -08:00
committed by Anup Patel
parent 69448a0790
commit c6c22f00f4
5 changed files with 114 additions and 131 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
include/sbi_utils/irqchip/plic.h
View File

@@ -17,6 +17,7 @@ struct plic_data {
unsigned long size;
unsigned long num_src;
unsigned long flags;
void *pm_data;
s16 context_map[][2];
};
@@ -24,6 +25,8 @@ struct plic_data {
#define PLIC_FLAG_ARIANE_BUG BIT(0)
/** PLIC must be delegated to S-mode like T-HEAD C906 and C910 */
#define PLIC_FLAG_THEAD_DELEGATION BIT(1)
/** Allocate space for power management save/restore operations */
#define PLIC_FLAG_ENABLE_PM BIT(2)
#define PLIC_M_CONTEXT 0
#define PLIC_S_CONTEXT 1
@@ -31,22 +34,14 @@ struct plic_data {
#define PLIC_DATA_SIZE(__hart_count) (sizeof(struct plic_data) + \
(__hart_count) * 2 * sizeof(s16))
/* So far, priorities on all consumers of these functions fit in 8 bits. */
void plic_priority_save(const struct plic_data *plic, u8 *priority, u32 num);
#define PLIC_IE_WORDS(__p) ((__p)->num_src / 32 + 1)
void plic_priority_restore(const struct plic_data *plic, const u8 *priority,
u32 num);
void plic_suspend(const struct plic_data *plic);
void plic_delegate(const struct plic_data *plic);
void plic_context_save(const struct plic_data *plic, bool smode,
u32 *enable, u32 *threshold, u32 num);
void plic_context_restore(const struct plic_data *plic, bool smode,
const u32 *enable, u32 threshold, u32 num);
void plic_resume(const struct plic_data *plic);
int plic_warm_irqchip_init(const struct plic_data *plic);
int plic_cold_irqchip_init(const struct plic_data *plic);
int plic_cold_irqchip_init(struct plic_data *plic);
#endif