diff options
| author | Vineet Gupta <vgupta@synopsys.com> | 2014-09-10 19:05:38 +0530 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2015-06-22 14:06:56 +0530 |
| commit | 82fea5a1bbbe8c3b56d5f3efbf8880c7b25b1758 (patch) | |
| tree | 736061a26f019af1912dd6824f8ab4eb5a20eb33 /arch/arc/include | |
| parent | 173eaafaed284fc95209902f68f011d01d1eda02 (diff) | |
ARCv2: SMP: Support ARConnect (MCIP) for Inter-Core-Interrupts et al
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/include')
| -rw-r--r-- | arch/arc/include/asm/irq.h | 1 | ||||
| -rw-r--r-- | arch/arc/include/asm/mcip.h | 91 |
2 files changed, 92 insertions, 0 deletions
diff --git a/arch/arc/include/asm/irq.h b/arch/arc/include/asm/irq.h index 49014f0ef36d..bc5103637326 100644 --- a/arch/arc/include/asm/irq.h +++ b/arch/arc/include/asm/irq.h @@ -19,6 +19,7 @@ #else #define TIMER0_IRQ 16 #define TIMER1_IRQ 17 +#define IPI_IRQ 19 #endif #include <linux/interrupt.h> diff --git a/arch/arc/include/asm/mcip.h b/arch/arc/include/asm/mcip.h new file mode 100644 index 000000000000..31f9bac77a27 --- /dev/null +++ b/arch/arc/include/asm/mcip.h @@ -0,0 +1,91 @@ +/* + * ARConnect IP Support (Multi core enabler: Cross core IPI, RTC ...) + * + * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __ASM_MCIP_H +#define __ASM_MCIP_H + +#ifdef CONFIG_ISA_ARCV2 + +#include <asm/arcregs.h> + +#define ARC_REG_MCIP_BCR 0x0d0 +#define ARC_REG_MCIP_CMD 0x600 +#define ARC_REG_MCIP_WDATA 0x601 +#define ARC_REG_MCIP_READBACK 0x602 + +struct mcip_cmd { +#ifdef CONFIG_CPU_BIG_ENDIAN + unsigned int pad:8, param:16, cmd:8; +#else + unsigned int cmd:8, param:16, pad:8; +#endif + +#define CMD_INTRPT_GENERATE_IRQ 0x01 +#define CMD_INTRPT_GENERATE_ACK 0x02 +#define CMD_INTRPT_READ_STATUS 0x03 +#define CMD_INTRPT_CHECK_SOURCE 0x04 + +/* Semaphore Commands */ +#define CMD_SEMA_CLAIM_AND_READ 0x11 +#define CMD_SEMA_RELEASE 0x12 + +#define CMD_DEBUG_SET_MASK 0x34 +#define CMD_DEBUG_SET_SELECT 0x36 + +#define CMD_IDU_ENABLE 0x71 +#define CMD_IDU_DISABLE 0x72 +#define CMD_IDU_SET_MODE 0x74 +#define CMD_IDU_SET_DEST 0x76 +#define CMD_IDU_SET_MASK 0x7C + +#define IDU_M_TRIG_LEVEL 0x0 +#define IDU_M_TRIG_EDGE 0x1 + +#define IDU_M_DISTRI_RR 0x0 +#define IDU_M_DISTRI_DEST 0x2 +}; + +/* + * MCIP programming model + * + * - Simple commands write {cmd:8,param:16} to MCIP_CMD aux reg + * (param could be irq, common_irq, core_id ...) + * - More involved commands setup MCIP_WDATA with cmd specific data + * before invoking the simple command + */ +static inline void __mcip_cmd(unsigned int cmd, unsigned int param) +{ + struct mcip_cmd buf; + + buf.pad = 0; + buf.cmd = cmd; + buf.param = param; + + WRITE_AUX(ARC_REG_MCIP_CMD, buf); +} + +/* + * Setup additional data for a cmd + * Callers need to lock to ensure atomicity + */ +static inline void __mcip_cmd_data(unsigned int cmd, unsigned int param, + unsigned int data) +{ + write_aux_reg(ARC_REG_MCIP_WDATA, data); + + __mcip_cmd(cmd, param); +} + +extern void mcip_init_early_smp(void); +extern void mcip_init_smp(unsigned int cpu); + +#endif + +#endif |