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with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1792.17; Mon, 15 Apr 2019 09:37:23 +0000 Received: from MN2PR04MB6061.namprd04.prod.outlook.com ([fe80::ad2f:3a0f:2de1:6fb2]) by MN2PR04MB6061.namprd04.prod.outlook.com ([fe80::ad2f:3a0f:2de1:6fb2%5]) with mapi id 15.20.1792.018; Mon, 15 Apr 2019 09:37:23 +0000 From: Anup Patel To: Palmer Dabbelt , Albert Ou Subject: [PATCH v3 2/3] RISC-V: Add interrupt related SCAUSE defines in asm/csr.h Thread-Topic: [PATCH v3 2/3] RISC-V: Add interrupt related SCAUSE defines in asm/csr.h Thread-Index: AQHU827U4QwgrExo4UujjLmFmbLC7A== Date: Mon, 15 Apr 2019 09:37:23 +0000 Message-ID: <20190415093648.7525-3-anup.patel@wdc.com> References: <20190415093648.7525-1-anup.patel@wdc.com> In-Reply-To: <20190415093648.7525-1-anup.patel@wdc.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: BYAPR04CA0022.namprd04.prod.outlook.com (2603:10b6:a03:40::35) To 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X-CRM114-Status: GOOD ( 15.76 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anup Patel , "linux-kernel@vger.kernel.org" , Christoph Hellwig , Atish Patra , Paul Walmsley , "linux-riscv@lists.infradead.org" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+infradead-linux-riscv=archiver.kernel.org@lists.infradead.org This patch adds SCAUSE interrupt flag and SCAUSE interrupt related defines to asm/csr.h. We also use these defines in kernel/irq.c and express SIE/SIP flags in-terms of SCAUSE interrupt causes. Signed-off-by: Anup Patel --- arch/riscv/include/asm/csr.h | 25 +++++++++++++++++++++---- arch/riscv/kernel/irq.c | 23 ++++------------------- 2 files changed, 25 insertions(+), 23 deletions(-) diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 2ae54a7386f1..ab40a936cb2d 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -51,10 +51,22 @@ #define SATP_MODE SATP_MODE_39 #endif -/* Interrupt Enable and Interrupt Pending flags */ -#define SIE_SSIE _AC(0x00000002, UL) /* Software Interrupt Enable */ -#define SIE_STIE _AC(0x00000020, UL) /* Timer Interrupt Enable */ -#define SIE_SEIE _AC(0x00000200, UL) /* External Interrupt Enable */ +/* SCAUSE */ +#ifdef CONFIG_64BIT +#define SCAUSE_IRQ_FLAG _AC(0x8000000000000000, UL) +#else +#define SCAUSE_IRQ_FLAG _AC(0x80000000, UL) +#endif + +#define IRQ_U_SOFT 0 +#define IRQ_S_SOFT 1 +#define IRQ_M_SOFT 3 +#define IRQ_U_TIMER 4 +#define IRQ_S_TIMER 5 +#define IRQ_M_TIMER 7 +#define IRQ_U_EXT 8 +#define IRQ_S_EXT 9 +#define IRQ_M_EXT 11 #define EXC_INST_MISALIGNED 0 #define EXC_INST_ACCESS 1 @@ -66,6 +78,11 @@ #define EXC_LOAD_PAGE_FAULT 13 #define EXC_STORE_PAGE_FAULT 15 +/* SIE (Interrupt Enable) and SIP (Interrupt Pending) flags */ +#define SIE_SSIE (_AC(0x1, UL) << IRQ_S_SOFT) +#define SIE_STIE (_AC(0x1, UL) << IRQ_S_TIMER) +#define SIE_SEIE (_AC(0x1, UL) << IRQ_S_EXT) + #ifndef __ASSEMBLY__ #define csr_swap(csr, val) \ diff --git a/arch/riscv/kernel/irq.c b/arch/riscv/kernel/irq.c index 48e6b7db83a1..68e5025b5a58 100644 --- a/arch/riscv/kernel/irq.c +++ b/arch/riscv/kernel/irq.c @@ -11,21 +11,6 @@ #include #include -/* - * Possible interrupt causes: - */ -#define INTERRUPT_CAUSE_SOFTWARE 1 -#define INTERRUPT_CAUSE_TIMER 5 -#define INTERRUPT_CAUSE_EXTERNAL 9 - -/* - * The high order bit of the trap cause register is always set for - * interrupts, which allows us to differentiate them from exceptions - * quickly. The INTERRUPT_CAUSE_* macros don't contain that bit, so we - * need to mask it off. - */ -#define INTERRUPT_CAUSE_FLAG (1UL << (__riscv_xlen - 1)) - int arch_show_interrupts(struct seq_file *p, int prec) { show_ipi_stats(p, prec); @@ -37,12 +22,12 @@ asmlinkage void __irq_entry do_IRQ(struct pt_regs *regs) struct pt_regs *old_regs = set_irq_regs(regs); irq_enter(); - switch (regs->scause & ~INTERRUPT_CAUSE_FLAG) { - case INTERRUPT_CAUSE_TIMER: + switch (regs->scause & ~SCAUSE_IRQ_FLAG) { + case IRQ_S_TIMER: riscv_timer_interrupt(); break; #ifdef CONFIG_SMP - case INTERRUPT_CAUSE_SOFTWARE: + case IRQ_S_SOFT: /* * We only use software interrupts to pass IPIs, so if a non-SMP * system gets one, then we don't know what to do. @@ -50,7 +35,7 @@ asmlinkage void __irq_entry do_IRQ(struct pt_regs *regs) riscv_software_interrupt(); break; #endif - case INTERRUPT_CAUSE_EXTERNAL: + case IRQ_S_EXT: handle_arch_irq(regs); break; default: -- 2.17.1 _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv