From 7c9540ea1d46a776ec92b58f99074f51b430f9bb Mon Sep 17 00:00:00 2001 From: Xiang Wang Date: Thu, 11 Oct 2018 17:30:37 +0800 Subject: riscv: add support smp_pause / smp_resume MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit See https://doc.coreboot.org/arch/riscv/ we know that we need to execute smp_pause at the start of each stage and smp_resume at the end of each stage. Change-Id: I6f8159637bfb15f54f0abeb335de2ba6e9cf82fb Signed-off-by: Xiang Wang Reviewed-on: https://review.coreboot.org/29023 Tested-by: build bot (Jenkins) Reviewed-by: Jonathan Neuschäfer Reviewed-by: Philipp Hug --- src/arch/riscv/include/mcall.h | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) (limited to 'src/arch/riscv/include/mcall.h') diff --git a/src/arch/riscv/include/mcall.h b/src/arch/riscv/include/mcall.h index d1e414a42f..29df736d1b 100644 --- a/src/arch/riscv/include/mcall.h +++ b/src/arch/riscv/include/mcall.h @@ -18,7 +18,7 @@ // NOTE: this is the size of hls_t below. A static_assert would be // nice to have. -#define HLS_SIZE 64 +#define HLS_SIZE 88 /* We save 37 registers, currently. */ #define MENTRY_FRAME_SIZE (HLS_SIZE + 37 * 8) @@ -35,6 +35,12 @@ typedef struct { unsigned long sbi_private_data; } sbi_device_message; +struct blocker { + void *arg; + void (*fn)(void *arg); + uint32_t sync_a; + uint32_t sync_b; +}; typedef struct { sbi_device_message *device_request_queue_head; @@ -46,6 +52,7 @@ typedef struct { int ipi_pending; uint64_t *timecmp; uint64_t *time; + struct blocker entry; } hls_t; #define MACHINE_STACK_TOP() ({ \ @@ -64,6 +71,15 @@ void hls_init(uint32_t hart_id); // need to call this before launching linux /* This function is used to initialize HLS()->time/HLS()->timecmp */ void mtime_init(void); +/* + * This function needs be implement by SoC code. + * Although the privileged instruction set defines that MSIP will be + * memory-mapped, but does not define how to map. SoC can be implemented as + * a bit, a byte, a word, and so on. + * So we can't provide code that is related to implementation. + */ +void set_msip(int hartid, int val); + #endif // __ASSEMBLER__ #endif -- cgit v1.2.3