[v9,14/21] riscv: Clean up IPI initialization code

Message ID	20200423023320.1380090-15-seanga2@gmail.com
State	Superseded
Headers	show List-Id: U-Boot discussion <u-boot.lists.denx.de> From: seanga2 at gmail.com (Sean Anderson) Date: Wed, 22 Apr 2020 22:33:13 -0400 Subject: [PATCH v9 14/21] riscv: Clean up IPI initialization code In-Reply-To: <20200423023320.1380090-1-seanga2@gmail.com> References: <20200423023320.1380090-1-seanga2@gmail.com> Message-ID: <20200423023320.1380090-15-seanga2@gmail.com>
Series	riscv: Add Sipeed Maix support \| expand [v9,00/21] riscv: Add Sipeed Maix support [v9,01/21] clk: Always use the supplied struct clk [v9,02/21] clk: Check that ops of composite clock components exist before calling [v9,03/21] clk: Unconditionally recursively en-/dis-able clocks [v9,04/21] clk: Fix clk_get_by_* handling of index [v9,05/21] clk: Add K210 pll support [v9,06/21] clk: Add a bypass clock for K210 [v9,07/21] clk: Add K210 clock support [v9,08/21] dm: Add support for simple-pm-bus [v9,09/21] dm: Fix error handling for dev_read_addr_ptr [v9,10/21] reset: Add generic reset driver [v9,11/21] lib: Always set errno in hcreate_r [v9,12/21] riscv: Add headers for asm/global_data.h [v9,13/21] riscv: Clear pending interrupts before enabling IPIs [v9,14/21] riscv: Clean up IPI initialization code [v9,15/21] riscv: Add option to support RISC-V privileged spec 1.9 [v9,16/21] riscv: Allow use of reset drivers [v9,17/21] riscv: Try to get cpu frequency from a "clocks" node if it exists [v9,18/21] riscv: Enable cpu clock if it is present [v9,19/21] riscv: Add device tree for K210 and Sipeed Maix BitM [v9,20/21] doc: riscv: Add documentation for Sipeed Maix Bit [v9,21/21] riscv: Add Sipeed Maix support

diff --git a/arch/riscv/cpu/cpu.c b/arch/riscv/cpu/cpu.c index e457f6acbf..f851374255 100644 --- a/arch/riscv/cpu/cpu.c +++ b/arch/riscv/cpu/cpu.c @@ -96,6 +96,12 @@ int arch_cpu_init_dm(void) csr_write(CSR_SATP, 0); } +#ifdef CONFIG_SMP + ret = riscv_init_ipi(); + if (ret) + return ret; +#endif + return 0; } diff --git a/arch/riscv/include/asm/smp.h b/arch/riscv/include/asm/smp.h index 74de92ed13..1b428856b2 100644 --- a/arch/riscv/include/asm/smp.h +++ b/arch/riscv/include/asm/smp.h @@ -51,4 +51,47 @@ void handle_ipi(ulong hart); */ int smp_call_function(ulong addr, ulong arg0, ulong arg1, int wait); +/** + * riscv_init_ipi() - Initialize inter-process interrupt (IPI) driver + * + * Platform code must provide this function. This function is called once after + * the cpu driver is initialized. No other riscv_*_ipi() calls will be made + * before this function is called. + * + * @return 0 if OK, -ve on error + */ +int riscv_init_ipi(void); + +/** + * riscv_send_ipi() - Send inter-processor interrupt (IPI) + * + * Platform code must provide this function. + * + * @hart: Hart ID of receiving hart + * @return 0 if OK, -ve on error + */ +int riscv_send_ipi(int hart); + +/** + * riscv_clear_ipi() - Clear inter-processor interrupt (IPI) + * + * Platform code must provide this function. + * + * @hart: Hart ID of hart to be cleared + * @return 0 if OK, -ve on error + */ +int riscv_clear_ipi(int hart); + +/** + * riscv_get_ipi() - Get status of inter-processor interrupt (IPI) + * + * Platform code must provide this function. + * + * @hart: Hart ID of hart to be checked + * @pending: Pointer to variable with result of the check, + * 1 if IPI is pending, 0 otherwise + * @return 0 if OK, -ve on error + */ +int riscv_get_ipi(int hart, int *pending); + #endif diff --git a/arch/riscv/lib/andes_plic.c b/arch/riscv/lib/andes_plic.c index 20529ab3eb..5cf29df670 100644 --- a/arch/riscv/lib/andes_plic.c +++ b/arch/riscv/lib/andes_plic.c @@ -30,20 +30,6 @@ #define SEND_IPI_TO_HART(hart) (0x80 >> (hart)) DECLARE_GLOBAL_DATA_PTR; -static int init_plic(void); - -#define PLIC_BASE_GET(void) \ - do { \ - long *ret; \ - \ - if (!gd->arch.plic) { \ - ret = syscon_get_first_range(RISCV_SYSCON_PLIC); \ - if (IS_ERR(ret)) \ - return PTR_ERR(ret); \ - gd->arch.plic = ret; \ - init_plic(); \ - } \ - } while (0) static int enable_ipi(int hart) { @@ -93,13 +79,21 @@ static int init_plic(void) return -ENODEV; } +int riscv_init_ipi(void) +{ + long *ret = syscon_get_first_range(RISCV_SYSCON_PLIC); + + if (IS_ERR(ret)) + return PTR_ERR(ret); + gd->arch.plic = ret; + + return init_plic(); +} + int riscv_send_ipi(int hart) { - unsigned int ipi; + unsigned int ipi = (SEND_IPI_TO_HART(hart) << (8 * gd->arch.boot_hart)); - PLIC_BASE_GET(); - - ipi = (SEND_IPI_TO_HART(hart) << (8 * gd->arch.boot_hart)); writel(ipi, (void __iomem *)PENDING_REG(gd->arch.plic, gd->arch.boot_hart)); @@ -110,8 +104,6 @@ int riscv_clear_ipi(int hart) { u32 source_id; - PLIC_BASE_GET(); - source_id = readl((void __iomem *)CLAIM_REG(gd->arch.plic, hart)); writel(source_id, (void __iomem *)CLAIM_REG(gd->arch.plic, hart)); @@ -120,8 +112,6 @@ int riscv_clear_ipi(int hart) int riscv_get_ipi(int hart, int *pending) { - PLIC_BASE_GET(); - *pending = readl((void __iomem *)PENDING_REG(gd->arch.plic, gd->arch.boot_hart)); *pending = !!(*pending & SEND_IPI_TO_HART(hart)); diff --git a/arch/riscv/lib/sbi_ipi.c b/arch/riscv/lib/sbi_ipi.c index abafca9e5c..d02e2b4c48 100644 --- a/arch/riscv/lib/sbi_ipi.c +++ b/arch/riscv/lib/sbi_ipi.c @@ -8,6 +8,11 @@ #include <asm/encoding.h> #include <asm/sbi.h> +int riscv_init_ipi(void) +{ + return 0; +} + int riscv_send_ipi(int hart) { ulong mask; diff --git a/arch/riscv/lib/sifive_clint.c b/arch/riscv/lib/sifive_clint.c index 5e0d25720b..78fc6c868d 100644 --- a/arch/riscv/lib/sifive_clint.c +++ b/arch/riscv/lib/sifive_clint.c @@ -24,22 +24,8 @@ DECLARE_GLOBAL_DATA_PTR; -#define CLINT_BASE_GET(void) \ - do { \ - long *ret; \ - \ - if (!gd->arch.clint) { \ - ret = syscon_get_first_range(RISCV_SYSCON_CLINT); \ - if (IS_ERR(ret)) \ - return PTR_ERR(ret); \ - gd->arch.clint = ret; \ - } \ - } while (0) - int riscv_get_time(u64 *time) { - CLINT_BASE_GET(); - *time = readq((void __iomem *)MTIME_REG(gd->arch.clint)); return 0; @@ -47,17 +33,24 @@ int riscv_get_time(u64 *time) int riscv_set_timecmp(int hart, u64 cmp) { - CLINT_BASE_GET(); - writeq(cmp, (void __iomem *)MTIMECMP_REG(gd->arch.clint, hart)); return 0; } +int riscv_init_ipi(void) +{ + long *ret = syscon_get_first_range(RISCV_SYSCON_CLINT); + + if (IS_ERR(ret)) + return PTR_ERR(ret); + gd->arch.clint = ret; + + return 0; +} + int riscv_send_ipi(int hart) { - CLINT_BASE_GET(); - writel(1, (void __iomem *)MSIP_REG(gd->arch.clint, hart)); return 0; @@ -65,8 +58,6 @@ int riscv_send_ipi(int hart) int riscv_clear_ipi(int hart) { - CLINT_BASE_GET(); - writel(0, (void __iomem *)MSIP_REG(gd->arch.clint, hart)); return 0; @@ -74,8 +65,6 @@ int riscv_clear_ipi(int hart) int riscv_get_ipi(int hart, int *pending) { - CLINT_BASE_GET(); - *pending = readl((void __iomem *)MSIP_REG(gd->arch.clint, hart)); return 0; diff --git a/arch/riscv/lib/smp.c b/arch/riscv/lib/smp.c index 17adb35730..fe992eb00f 100644 --- a/arch/riscv/lib/smp.c +++ b/arch/riscv/lib/smp.c @@ -12,38 +12,6 @@ DECLARE_GLOBAL_DATA_PTR; -/** - * riscv_send_ipi() - Send inter-processor interrupt (IPI) - * - * Platform code must provide this function. - * - * @hart: Hart ID of receiving hart - * @return 0 if OK, -ve on error - */ -extern int riscv_send_ipi(int hart); - -/** - * riscv_clear_ipi() - Clear inter-processor interrupt (IPI) - * - * Platform code must provide this function. - * - * @hart: Hart ID of hart to be cleared - * @return 0 if OK, -ve on error - */ -extern int riscv_clear_ipi(int hart); - -/** - * riscv_get_ipi() - Get status of inter-processor interrupt (IPI) - * - * Platform code must provide this function. - * - * @hart: Hart ID of hart to be checked - * @pending: Pointer to variable with result of the check, - * 1 if IPI is pending, 0 otherwise - * @return 0 if OK, -ve on error - */ -extern int riscv_get_ipi(int hart, int *pending); - static int send_ipi_many(struct ipi_data *ipi, int wait) { ofnode node, cpus; @@ -114,7 +82,6 @@ void handle_ipi(ulong hart) return; __smp_mb(); - smp_function = (void (*)(ulong, ulong, ulong))gd->arch.ipi[hart].addr; invalidate_icache_all(); @@ -124,7 +91,13 @@ void handle_ipi(ulong hart) */ ret = riscv_clear_ipi(hart); if (ret) { - pr_err("Cannot clear IPI of hart %ld\n", hart); + pr_err("Cannot clear IPI of hart %ld (error %d)\n", hart, ret); + return; + } + + /* Sanity check */ + if (!smp_function) { + pr_err("smp_function is NULL on hart %ld\n", hart); return; } @@ -133,14 +106,11 @@ void handle_ipi(ulong hart) int smp_call_function(ulong addr, ulong arg0, ulong arg1, int wait) { - int ret = 0; - struct ipi_data ipi; + struct ipi_data ipi = { + .addr = addr, + .arg0 = arg0, + .arg1 = arg1, + }; - ipi.addr = addr; - ipi.arg0 = arg0; - ipi.arg1 = arg1; - - ret = send_ipi_many(&ipi, wait); - - return ret; + return send_ipi_many(&ipi, wait); }

[v9,14/21] riscv: Clean up IPI initialization code

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