/* SPDX-License-Identifier: GPL-2.0+ */ /* * Copyright (C) 2017, Bin Meng */ #ifndef __ASM_ACPI_S3_H__ #define __ASM_ACPI_S3_H__ #define WAKEUP_BASE 0x600 /* PM1_STATUS register */ #define WAK_STS (1 << 15) #define PCIEXPWAK_STS (1 << 14) #define RTC_STS (1 << 10) #define SLPBTN_STS (1 << 9) #define PWRBTN_STS (1 << 8) #define GBL_STS (1 << 5) #define BM_STS (1 << 4) #define TMR_STS (1 << 0) /* PM1_CNT register */ #define SLP_EN (1 << 13) #define SLP_TYP_SHIFT 10 #define SLP_TYP (7 << SLP_TYP_SHIFT) #define SLP_TYP_S0 0 #define SLP_TYP_S1 1 #define SLP_TYP_S3 5 #define SLP_TYP_S4 6 #define SLP_TYP_S5 7 /* Memory size reserved for S3 resume */ #define S3_RESERVE_SIZE 0x1000 #ifndef __ASSEMBLY__ extern char __wakeup[]; extern int __wakeup_size; enum acpi_sleep_state { ACPI_S0, ACPI_S1, ACPI_S2, ACPI_S3, ACPI_S4, ACPI_S5, }; /** * acpi_ss_string() - get ACPI-defined sleep state string * * @pm1_cnt: ACPI-defined sleep state * @return: a pointer to the sleep state string. */ static inline char *acpi_ss_string(enum acpi_sleep_state state) { char *ss_string[] = { "S0", "S1", "S2", "S3", "S4", "S5"}; return ss_string[state]; } /** * acpi_sleep_from_pm1() - get ACPI-defined sleep state from PM1_CNT register * * @pm1_cnt: PM1_CNT register value * @return: ACPI-defined sleep state if given valid PM1_CNT register value, * -EINVAL otherwise. */ static inline enum acpi_sleep_state acpi_sleep_from_pm1(u32 pm1_cnt) { switch ((pm1_cnt & SLP_TYP) >> SLP_TYP_SHIFT) { case SLP_TYP_S0: return ACPI_S0; case SLP_TYP_S1: return ACPI_S1; case SLP_TYP_S3: return ACPI_S3; case SLP_TYP_S4: return ACPI_S4; case SLP_TYP_S5: return ACPI_S5; } return -EINVAL; } /** * chipset_prev_sleep_state() - Get chipset previous sleep state * * This returns chipset previous sleep state from ACPI registers. * Platform codes must supply this routine in order to support ACPI S3. * * @return ACPI_S0/S1/S2/S3/S4/S5. */ enum acpi_sleep_state chipset_prev_sleep_state(void); /** * chipset_clear_sleep_state() - Clear chipset sleep state * * This clears chipset sleep state in ACPI registers. * Platform codes must supply this routine in order to support ACPI S3. */ void chipset_clear_sleep_state(void); struct acpi_fadt; /** * acpi_resume() - Do ACPI S3 resume * * This calls U-Boot wake up assembly stub and jumps to OS's wake up vector. * * @fadt: FADT table pointer in the ACPI table * @return: Never returns */ void acpi_resume(struct acpi_fadt *fadt); /** * acpi_s3_reserve() - Reserve memory for ACPI S3 resume * * This copies memory where real mode interrupt handler stubs reside to the * reserved place on the stack. * * This routine should be called by reserve_arch() before U-Boot is relocated * when ACPI S3 resume is enabled. * * @return: 0 always */ int acpi_s3_reserve(void); #endif /* __ASSEMBLY__ */ #endif /* __ASM_ACPI_S3_H__ */