diff options
| -rw-r--r-- | arch/arc/plat-arcfpga/Kconfig | 17 | ||||
| -rw-r--r-- | arch/arc/plat-arcfpga/Makefile | 3 | ||||
| -rw-r--r-- | arch/arc/plat-arcfpga/include/plat/smp.h | 118 | ||||
| -rw-r--r-- | arch/arc/plat-arcfpga/platform.c | 5 | ||||
| -rw-r--r-- | arch/arc/plat-arcfpga/smp.c | 186 |
5 files changed, 0 insertions, 329 deletions
diff --git a/arch/arc/plat-arcfpga/Kconfig b/arch/arc/plat-arcfpga/Kconfig index 217593a70751..043bac36f34f 100644 --- a/arch/arc/plat-arcfpga/Kconfig +++ b/arch/arc/plat-arcfpga/Kconfig @@ -14,20 +14,3 @@ menuconfig ARC_PLAT_FPGA_LEGACY These are based on FPGA or ISS. e.g. - ARCAngel4 - ML509 - - MetaWare ISS - -if ARC_PLAT_FPGA_LEGACY - -config ISS_SMP_EXTN - bool "ARC SMP Extensions (ISS Models only)" - default n - depends on SMP - help - SMP Extensions to ARC700, in a "simulation only" Model, supported in - ARC ISS (Instruction Set Simulator). - The SMP extensions include: - -IDU (Interrupt Distribution Unit) - -XTL (To enable CPU start/stop/set-PC for another CPU) - It doesn't provide coherent Caches and/or Atomic Ops (LLOCK/SCOND) - -endif diff --git a/arch/arc/plat-arcfpga/Makefile b/arch/arc/plat-arcfpga/Makefile index 66fd0ecd68b3..00b1a958cec7 100644 --- a/arch/arc/plat-arcfpga/Makefile +++ b/arch/arc/plat-arcfpga/Makefile @@ -6,7 +6,4 @@ # published by the Free Software Foundation. # -KBUILD_CFLAGS += -Iarch/arc/plat-arcfpga/include - obj-y := platform.o -obj-$(CONFIG_ISS_SMP_EXTN) += smp.o diff --git a/arch/arc/plat-arcfpga/include/plat/smp.h b/arch/arc/plat-arcfpga/include/plat/smp.h deleted file mode 100644 index c09eb4cfc77c..000000000000 --- a/arch/arc/plat-arcfpga/include/plat/smp.h +++ /dev/null @@ -1,118 +0,0 @@ -/* - * Copyright (C) 2004, 2007-2010, 2011-2012 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. - * - * Rajeshwar Ranga: Interrupt Distribution Unit API's - */ - -#ifndef __PLAT_ARCFPGA_SMP_H -#define __PLAT_ARCFPGA_SMP_H - -#ifdef CONFIG_SMP - -#include <linux/types.h> -#include <asm/arcregs.h> - -#define ARC_AUX_IDU_REG_CMD 0x2000 -#define ARC_AUX_IDU_REG_PARAM 0x2001 - -#define ARC_AUX_XTL_REG_CMD 0x2002 -#define ARC_AUX_XTL_REG_PARAM 0x2003 - -#define ARC_REG_MP_BCR 0x2021 - -#define ARC_XTL_CMD_WRITE_PC 0x04 -#define ARC_XTL_CMD_CLEAR_HALT 0x02 - -/* - * Build Configuration Register which identifies the sub-components - */ -struct bcr_mp { -#ifdef CONFIG_CPU_BIG_ENDIAN - unsigned int mp_arch:16, pad:5, sdu:1, idu:1, scu:1, ver:8; -#else - unsigned int ver:8, scu:1, idu:1, sdu:1, pad:5, mp_arch:16; -#endif -}; - -/* IDU supports 256 common interrupts */ -#define NR_IDU_IRQS 256 - -/* - * The Aux Regs layout is same bit-by-bit in both BE/LE modes. - * However when casted as a bitfield encoded "C" struct, gcc treats it as - * memory, generating different code for BE/LE, requiring strcture adj (see - * include/asm/arcregs.h) - * - * However when manually "carving" the value for a Aux, no special handling - * of BE is needed because of the property discribed above - */ -#define IDU_SET_COMMAND(irq, cmd) \ -do { \ - uint32_t __val; \ - __val = (((irq & 0xFF) << 8) | (cmd & 0xFF)); \ - write_aux_reg(ARC_AUX_IDU_REG_CMD, __val); \ -} while (0) - -#define IDU_SET_PARAM(par) write_aux_reg(ARC_AUX_IDU_REG_PARAM, par) -#define IDU_GET_PARAM() read_aux_reg(ARC_AUX_IDU_REG_PARAM) - -/* IDU Commands */ -#define IDU_DISABLE 0x00 -#define IDU_ENABLE 0x01 -#define IDU_IRQ_CLEAR 0x02 -#define IDU_IRQ_ASSERT 0x03 -#define IDU_IRQ_WMODE 0x04 -#define IDU_IRQ_STATUS 0x05 -#define IDU_IRQ_ACK 0x06 -#define IDU_IRQ_PEND 0x07 -#define IDU_IRQ_RMODE 0x08 -#define IDU_IRQ_WBITMASK 0x09 -#define IDU_IRQ_RBITMASK 0x0A - -#define idu_enable() IDU_SET_COMMAND(0, IDU_ENABLE) -#define idu_disable() IDU_SET_COMMAND(0, IDU_DISABLE) - -#define idu_irq_assert(irq) IDU_SET_COMMAND((irq), IDU_IRQ_ASSERT) -#define idu_irq_clear(irq) IDU_SET_COMMAND((irq), IDU_IRQ_CLEAR) - -/* IDU Interrupt Mode - Destination Encoding */ -#define IDU_IRQ_MOD_DISABLE 0x00 -#define IDU_IRQ_MOD_ROUND_RECP 0x01 -#define IDU_IRQ_MOD_TCPU_FIRSTRECP 0x02 -#define IDU_IRQ_MOD_TCPU_ALLRECP 0x03 - -/* IDU Interrupt Mode - Triggering Mode */ -#define IDU_IRQ_MODE_LEVEL_TRIG 0x00 -#define IDU_IRQ_MODE_PULSE_TRIG 0x01 - -#define IDU_IRQ_MODE_PARAM(dest_mode, trig_mode) \ - (((trig_mode & 0x01) << 15) | (dest_mode & 0xFF)) - -struct idu_irq_config { - uint8_t irq; - uint8_t dest_mode; - uint8_t trig_mode; -}; - -struct idu_irq_status { - uint8_t irq; - bool enabled; - bool status; - bool ack; - bool pend; - uint8_t next_rr; -}; - -extern void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask); -extern void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode); - -extern void iss_model_init_smp(unsigned int cpu); -extern void iss_model_init_early_smp(void); - -#endif /* CONFIG_SMP */ - -#endif diff --git a/arch/arc/plat-arcfpga/platform.c b/arch/arc/plat-arcfpga/platform.c index afc88254acc1..c79a05c47ebd 100644 --- a/arch/arc/plat-arcfpga/platform.c +++ b/arch/arc/plat-arcfpga/platform.c @@ -10,7 +10,6 @@ #include <linux/init.h> #include <asm/mach_desc.h> -#include <plat/smp.h> /*----------------------- Machine Descriptions ------------------------------ * @@ -28,10 +27,6 @@ static const char *legacy_fpga_compat[] __initconst = { MACHINE_START(LEGACY_FPGA, "legacy_fpga") .dt_compat = legacy_fpga_compat, -#ifdef CONFIG_ISS_SMP_EXTN - .init_early = iss_model_init_early_smp, - .init_smp = iss_model_init_smp, -#endif MACHINE_END static const char *simulation_compat[] __initconst = { diff --git a/arch/arc/plat-arcfpga/smp.c b/arch/arc/plat-arcfpga/smp.c deleted file mode 100644 index 64797ba3bbe3..000000000000 --- a/arch/arc/plat-arcfpga/smp.c +++ /dev/null @@ -1,186 +0,0 @@ -/* - * ARC700 Simulation-only Extensions for SMP - * - * Copyright (C) 2004, 2007-2010, 2011-2012 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. - * - * Vineet Gupta - 2012 : split off arch common and plat specific SMP - * Rajeshwar Ranga - 2007 : Interrupt Distribution Unit API's - */ - -#include <linux/smp.h> -#include <linux/irq.h> -#include <plat/smp.h> - -#define IDU_INTERRUPT_0 16 - -static char smp_cpuinfo_buf[128]; - -/* - *------------------------------------------------------------------- - * Platform specific callbacks expected by arch SMP code - *------------------------------------------------------------------- - */ - -/* - * Master kick starting another CPU - */ -static void iss_model_smp_wakeup_cpu(int cpu, unsigned long pc) -{ - /* setup the start PC */ - write_aux_reg(ARC_AUX_XTL_REG_PARAM, pc); - - /* Trigger WRITE_PC cmd for this cpu */ - write_aux_reg(ARC_AUX_XTL_REG_CMD, - (ARC_XTL_CMD_WRITE_PC | (cpu << 8))); - - /* Take the cpu out of Halt */ - write_aux_reg(ARC_AUX_XTL_REG_CMD, - (ARC_XTL_CMD_CLEAR_HALT | (cpu << 8))); - -} - -static inline int get_hw_config_num_irq(void) -{ - uint32_t val = read_aux_reg(ARC_REG_VECBASE_BCR); - - switch (val & 0x03) { - case 0: - return 16; - case 1: - return 32; - case 2: - return 8; - default: - return 0; - } - - return 0; -} - -/* - * Any SMP specific init any CPU does when it comes up. - * Here we setup the CPU to enable Inter-Processor-Interrupts - * Called for each CPU - * -Master : init_IRQ() - * -Other(s) : start_kernel_secondary() - */ -void iss_model_init_smp(unsigned int cpu) -{ - /* Check if CPU is configured for more than 16 interrupts */ - if (NR_IRQS <= 16 || get_hw_config_num_irq() <= 16) - panic("[arcfpga] IRQ system can't support IDU IPI\n"); - - idu_disable(); - - /**************************************************************** - * IDU provides a set of Common IRQs, each of which can be dynamically - * attached to (1|many|all) CPUs. - * The Common IRQs [0-15] are mapped as CPU pvt [16-31] - * - * Here we use a simple 1:1 mapping: - * A CPU 'x' is wired to Common IRQ 'x'. - * So an IDU ASSERT on IRQ 'x' will trigger Interupt on CPU 'x', which - * makes up for our simple IPI plumbing. - * - * TBD: Have a dedicated multicast IRQ for sending IPIs to all CPUs - * w/o having to do one-at-a-time - ******************************************************************/ - - /* - * Claim an IRQ which would trigger IPI on this CPU. - * In IDU parlance it involves setting up a cpu bitmask for the IRQ - * The bitmap here contains only 1 CPU (self). - */ - idu_irq_set_tgtcpu(cpu, 0x1 << cpu); - - /* Set the IRQ destination to use the bitmask above */ - idu_irq_set_mode(cpu, 7, /* XXX: IDU_IRQ_MOD_TCPU_ALLRECP: ISS bug */ - IDU_IRQ_MODE_PULSE_TRIG); - - idu_enable(); - - /* Attach the arch-common IPI ISR to our IDU IRQ */ - smp_ipi_irq_setup(cpu, IDU_INTERRUPT_0 + cpu); -} - -static void iss_model_ipi_send(int cpu) -{ - idu_irq_assert(cpu); -} - -static void iss_model_ipi_clear(int irq) -{ - idu_irq_clear(IDU_INTERRUPT_0 + smp_processor_id()); -} - -void iss_model_init_early_smp(void) -{ -#define IS_AVAIL1(var, str) ((var) ? str : "") - - struct bcr_mp mp; - - READ_BCR(ARC_REG_MP_BCR, mp); - - sprintf(smp_cpuinfo_buf, "Extn [ISS-SMP]: v%d, arch(%d) %s %s %s\n", - mp.ver, mp.mp_arch, IS_AVAIL1(mp.scu, "SCU"), - IS_AVAIL1(mp.idu, "IDU"), IS_AVAIL1(mp.sdu, "SDU")); - - plat_smp_ops.info = smp_cpuinfo_buf; - - plat_smp_ops.cpu_kick = iss_model_smp_wakeup_cpu; - plat_smp_ops.ipi_send = iss_model_ipi_send; - plat_smp_ops.ipi_clear = iss_model_ipi_clear; -} - -/* - *------------------------------------------------------------------- - * Low level Platform IPI Providers - *------------------------------------------------------------------- - */ - -/* Set the Mode for the Common IRQ */ -void idu_irq_set_mode(uint8_t irq, uint8_t dest_mode, uint8_t trig_mode) -{ - uint32_t par = IDU_IRQ_MODE_PARAM(dest_mode, trig_mode); - - IDU_SET_PARAM(par); - IDU_SET_COMMAND(irq, IDU_IRQ_WMODE); -} - -/* Set the target cpu Bitmask for Common IRQ */ -void idu_irq_set_tgtcpu(uint8_t irq, uint32_t mask) -{ - IDU_SET_PARAM(mask); - IDU_SET_COMMAND(irq, IDU_IRQ_WBITMASK); -} - -/* Get the Interrupt Acknowledged status for IRQ (as CPU Bitmask) */ -bool idu_irq_get_ack(uint8_t irq) -{ - uint32_t val; - - IDU_SET_COMMAND(irq, IDU_IRQ_ACK); - val = IDU_GET_PARAM(); - - return val & (1 << irq); -} - -/* - * Get the Interrupt Pending status for IRQ (as CPU Bitmask) - * -Pending means CPU has not yet noticed the IRQ (e.g. disabled) - * -After Interrupt has been taken, the IPI expcitily needs to be - * cleared, to be acknowledged. - */ -bool idu_irq_get_pend(uint8_t irq) -{ - uint32_t val; - - IDU_SET_COMMAND(irq, IDU_IRQ_PEND); - val = IDU_GET_PARAM(); - - return val & (1 << irq); -} |