diff options
Diffstat (limited to 'arch/arc/plat-eznps')
| -rw-r--r-- | arch/arc/plat-eznps/Kconfig | 58 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/Makefile | 8 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/ctop.c | 21 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/entry.S | 60 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/include/plat/ctop.h | 208 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/include/plat/mtm.h | 49 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/include/plat/smp.h | 15 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/mtm.c | 166 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/platform.c | 91 | ||||
| -rw-r--r-- | arch/arc/plat-eznps/smp.c | 138 |
10 files changed, 0 insertions, 814 deletions
diff --git a/arch/arc/plat-eznps/Kconfig b/arch/arc/plat-eznps/Kconfig deleted file mode 100644 index a645bca5899a..000000000000 --- a/arch/arc/plat-eznps/Kconfig +++ /dev/null @@ -1,58 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0 -# -# For a description of the syntax of this configuration file, -# see Documentation/kbuild/kconfig-language.rst. -# - -menuconfig ARC_PLAT_EZNPS - bool "\"EZchip\" ARC dev platform" - depends on ISA_ARCOMPACT - select CPU_BIG_ENDIAN - select CLKSRC_NPS if !PHYS_ADDR_T_64BIT - select EZNPS_GIC - select EZCHIP_NPS_MANAGEMENT_ENET if ETHERNET - help - Support for EZchip development platforms, - based on ARC700 cores. - We handle few flavors: - - Hardware Emulator AKA HE which is FPGA based chassis - - Simulator based on MetaWare nSIM - - NPS400 chip based on ASIC - -config EZNPS_MTM_EXT - bool "ARC-EZchip MTM Extensions" - select CPUMASK_OFFSTACK - depends on ARC_PLAT_EZNPS && SMP - default y - help - Here we add new hierarchy for CPUs topology. - We got: - Core - Thread - At the new thread level each CPU represent one HW thread. - At highest hierarchy each core contain 16 threads, - any of them seem like CPU from Linux point of view. - All threads within same core share the execution unit of the - core and HW scheduler round robin between them. - -config EZNPS_MEM_ERROR_ALIGN - bool "ARC-EZchip Memory error as an exception" - depends on EZNPS_MTM_EXT - default n - help - On the real chip of the NPS, user memory errors are handled - as a machine check exception, which is fatal, whereas on - simulator platform for NPS, is handled as a Level 2 interrupt - (just a stock ARC700) which is recoverable. This option makes - simulator behave like hardware. - -config EZNPS_SHARED_AUX_REGS - bool "ARC-EZchip Shared Auxiliary Registers Per Core" - depends on ARC_PLAT_EZNPS - default y - help - On the real chip of the NPS, auxiliary registers are shared between - all the cpus of the core, whereas on simulator platform for NPS, - each cpu has a different set of auxiliary registers. Configuration - should be unset if auxiliary registers are not shared between the cpus - of the core, so there will be a need to initialize them per cpu. diff --git a/arch/arc/plat-eznps/Makefile b/arch/arc/plat-eznps/Makefile deleted file mode 100644 index ebb9723002cf..000000000000 --- a/arch/arc/plat-eznps/Makefile +++ /dev/null @@ -1,8 +0,0 @@ -# SPDX-License-Identifier: GPL-2.0-only -# -# Makefile for the linux kernel. -# - -obj-y := entry.o platform.o ctop.o -obj-$(CONFIG_SMP) += smp.o -obj-$(CONFIG_EZNPS_MTM_EXT) += mtm.o diff --git a/arch/arc/plat-eznps/ctop.c b/arch/arc/plat-eznps/ctop.c deleted file mode 100644 index b398e6e838a9..000000000000 --- a/arch/arc/plat-eznps/ctop.c +++ /dev/null @@ -1,21 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#include <linux/sched.h> -#include <asm/processor.h> -#include <plat/ctop.h> - -void dp_save_restore(struct task_struct *prev, struct task_struct *next) -{ - struct eznps_dp *prev_task_dp = &prev->thread.dp; - struct eznps_dp *next_task_dp = &next->thread.dp; - - /* Here we save all Data Plane related auxiliary registers */ - prev_task_dp->eflags = read_aux_reg(CTOP_AUX_EFLAGS); - write_aux_reg(CTOP_AUX_EFLAGS, next_task_dp->eflags); - - prev_task_dp->gpa1 = read_aux_reg(CTOP_AUX_GPA1); - write_aux_reg(CTOP_AUX_GPA1, next_task_dp->gpa1); -} diff --git a/arch/arc/plat-eznps/entry.S b/arch/arc/plat-eznps/entry.S deleted file mode 100644 index 3f18c0108e72..000000000000 --- a/arch/arc/plat-eznps/entry.S +++ /dev/null @@ -1,60 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/******************************************************************************* - - EZNPS CPU startup Code - Copyright(c) 2012 EZchip Technologies. - - -*******************************************************************************/ -#include <linux/linkage.h> -#include <asm/entry.h> -#include <asm/cache.h> -#include <plat/ctop.h> - - .cpu A7 - - .section .init.text, "ax",@progbits - .align 1024 ; HW requierment for restart first PC - -ENTRY(res_service) -#if defined(CONFIG_EZNPS_MTM_EXT) && defined(CONFIG_EZNPS_SHARED_AUX_REGS) - ; There is no work for HW thread id != 0 - lr r3, [CTOP_AUX_THREAD_ID] - cmp r3, 0 - jne stext -#endif - -#ifdef CONFIG_ARC_HAS_DCACHE - ; With no cache coherency mechanism D$ need to be used very carefully. - ; Address space: - ; 0G-2G: We disable CONFIG_ARC_CACHE_PAGES. - ; 2G-3G: We disable D$ by setting this bit. - ; 3G-4G: D$ is disabled by architecture. - ; FMT are huge pages for user application reside at 0-2G. - ; Only FMT left as one who can use D$ where each such page got - ; disable/enable bit for cachability. - ; Programmer will use FMT pages for private data so cache coherency - ; would not be a problem. - ; First thing we invalidate D$ - sr 1, [ARC_REG_DC_IVDC] - sr HW_COMPLY_KRN_NOT_D_CACHED, [CTOP_AUX_HW_COMPLY] -#endif - -#ifdef CONFIG_SMP - ; We set logical cpuid to be used by GET_CPUID - ; We do not use physical cpuid since we want ids to be continious when - ; it comes to cpus on the same quad cluster. - ; This is useful for applications that used shared resources of a quad - ; cluster such SRAMS. - lr r3, [CTOP_AUX_CORE_ID] - sr r3, [CTOP_AUX_LOGIC_CORE_ID] - lr r3, [CTOP_AUX_CLUSTER_ID] - ; Set logical is acheived by swap of 2 middle bits of cluster id (4 bit) - ; r3 is used since we use short instruction and we need q-class reg - .short CTOP_INST_MOV2B_FLIP_R3_B1_B2_INST - .word CTOP_INST_MOV2B_FLIP_R3_B1_B2_LIMM - sr r3, [CTOP_AUX_LOGIC_CLUSTER_ID] -#endif - - j stext -END(res_service) diff --git a/arch/arc/plat-eznps/include/plat/ctop.h b/arch/arc/plat-eznps/include/plat/ctop.h deleted file mode 100644 index 77712c5ffe84..000000000000 --- a/arch/arc/plat-eznps/include/plat/ctop.h +++ /dev/null @@ -1,208 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#ifndef _PLAT_EZNPS_CTOP_H -#define _PLAT_EZNPS_CTOP_H - -#ifndef CONFIG_ARC_PLAT_EZNPS -#error "Incorrect ctop.h include" -#endif - -#include <linux/bits.h> -#include <linux/types.h> -#include <soc/nps/common.h> - -/* core auxiliary registers */ -#ifdef __ASSEMBLY__ -#define CTOP_AUX_BASE (-0x800) -#else -#define CTOP_AUX_BASE 0xFFFFF800 -#endif - -#define CTOP_AUX_GLOBAL_ID (CTOP_AUX_BASE + 0x000) -#define CTOP_AUX_CLUSTER_ID (CTOP_AUX_BASE + 0x004) -#define CTOP_AUX_CORE_ID (CTOP_AUX_BASE + 0x008) -#define CTOP_AUX_THREAD_ID (CTOP_AUX_BASE + 0x00C) -#define CTOP_AUX_LOGIC_GLOBAL_ID (CTOP_AUX_BASE + 0x010) -#define CTOP_AUX_LOGIC_CLUSTER_ID (CTOP_AUX_BASE + 0x014) -#define CTOP_AUX_LOGIC_CORE_ID (CTOP_AUX_BASE + 0x018) -#define CTOP_AUX_MT_CTRL (CTOP_AUX_BASE + 0x020) -#define CTOP_AUX_HW_COMPLY (CTOP_AUX_BASE + 0x024) -#define CTOP_AUX_DPC (CTOP_AUX_BASE + 0x02C) -#define CTOP_AUX_LPC (CTOP_AUX_BASE + 0x030) -#define CTOP_AUX_EFLAGS (CTOP_AUX_BASE + 0x080) -#define CTOP_AUX_GPA1 (CTOP_AUX_BASE + 0x08C) -#define CTOP_AUX_UDMC (CTOP_AUX_BASE + 0x300) - -/* EZchip core instructions */ -#define CTOP_INST_HWSCHD_WFT_IE12 0x3E6F7344 -#define CTOP_INST_HWSCHD_OFF_R4 0x3C6F00BF -#define CTOP_INST_HWSCHD_RESTORE_R4 0x3E6F7103 -#define CTOP_INST_SCHD_RW 0x3E6F7004 -#define CTOP_INST_SCHD_RD 0x3E6F7084 -#define CTOP_INST_ASRI_0_R3 0x3B56003E -#define CTOP_INST_XEX_DI_R2_R2_R3 0x4A664C00 -#define CTOP_INST_EXC_DI_R2_R2_R3 0x4A664C01 -#define CTOP_INST_AADD_DI_R2_R2_R3 0x4A664C02 -#define CTOP_INST_AAND_DI_R2_R2_R3 0x4A664C04 -#define CTOP_INST_AOR_DI_R2_R2_R3 0x4A664C05 -#define CTOP_INST_AXOR_DI_R2_R2_R3 0x4A664C06 - -/* Do not use D$ for address in 2G-3G */ -#define HW_COMPLY_KRN_NOT_D_CACHED BIT(28) - -#define NPS_MSU_EN_CFG 0x80 -#define NPS_CRG_BLKID 0x480 -#define NPS_CRG_SYNC_BIT BIT(0) -#define NPS_GIM_BLKID 0x5C0 - -/* GIM registers and fields*/ -#define NPS_GIM_UART_LINE BIT(7) -#define NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE BIT(10) -#define NPS_GIM_DBG_LAN_EAST_RX_RDY_LINE BIT(11) -#define NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE BIT(25) -#define NPS_GIM_DBG_LAN_WEST_RX_RDY_LINE BIT(26) - -#ifndef __ASSEMBLY__ -/* Functional registers definition */ -struct nps_host_reg_mtm_cfg { - union { - struct { - u32 gen:1, gdis:1, clk_gate_dis:1, asb:1, - __reserved:9, nat:3, ten:16; - }; - u32 value; - }; -}; - -struct nps_host_reg_mtm_cpu_cfg { - union { - struct { - u32 csa:22, dmsid:6, __reserved:3, cs:1; - }; - u32 value; - }; -}; - -struct nps_host_reg_thr_init { - union { - struct { - u32 str:1, __reserved:27, thr_id:4; - }; - u32 value; - }; -}; - -struct nps_host_reg_thr_init_sts { - union { - struct { - u32 bsy:1, err:1, __reserved:26, thr_id:4; - }; - u32 value; - }; -}; - -struct nps_host_reg_msu_en_cfg { - union { - struct { - u32 __reserved1:11, - rtc_en:1, ipc_en:1, gim_1_en:1, - gim_0_en:1, ipi_en:1, buff_e_rls_bmuw:1, - buff_e_alc_bmuw:1, buff_i_rls_bmuw:1, buff_i_alc_bmuw:1, - buff_e_rls_bmue:1, buff_e_alc_bmue:1, buff_i_rls_bmue:1, - buff_i_alc_bmue:1, __reserved2:1, buff_e_pre_en:1, - buff_i_pre_en:1, pmuw_ja_en:1, pmue_ja_en:1, - pmuw_nj_en:1, pmue_nj_en:1, msu_en:1; - }; - u32 value; - }; -}; - -struct nps_host_reg_gim_p_int_dst { - union { - struct { - u32 int_out_en:1, __reserved1:4, - is:1, intm:2, __reserved2:4, - nid:4, __reserved3:4, cid:4, - __reserved4:4, tid:4; - }; - u32 value; - }; -}; - -/* AUX registers definition */ -struct nps_host_reg_aux_dpc { - union { - struct { - u32 ien:1, men:1, hen:1, reserved:29; - }; - u32 value; - }; -}; - -struct nps_host_reg_aux_udmc { - union { - struct { - u32 dcp:1, cme:1, __reserved:19, nat:3, - __reserved2:5, dcas:3; - }; - u32 value; - }; -}; - -struct nps_host_reg_aux_mt_ctrl { - union { - struct { - u32 mten:1, hsen:1, scd:1, sten:1, - st_cnt:8, __reserved:8, - hs_cnt:8, __reserved1:4; - }; - u32 value; - }; -}; - -struct nps_host_reg_aux_hw_comply { - union { - struct { - u32 me:1, le:1, te:1, knc:1, __reserved:28; - }; - u32 value; - }; -}; - -struct nps_host_reg_aux_lpc { - union { - struct { - u32 mep:1, __reserved:31; - }; - u32 value; - }; -}; - -/* CRG registers */ -#define REG_GEN_PURP_0 nps_host_reg_non_cl(NPS_CRG_BLKID, 0x1BF) - -/* GIM registers */ -#define REG_GIM_P_INT_EN_0 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x100) -#define REG_GIM_P_INT_POL_0 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x110) -#define REG_GIM_P_INT_SENS_0 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x114) -#define REG_GIM_P_INT_BLK_0 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x118) -#define REG_GIM_P_INT_DST_10 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x13A) -#define REG_GIM_P_INT_DST_11 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x13B) -#define REG_GIM_P_INT_DST_25 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x149) -#define REG_GIM_P_INT_DST_26 nps_host_reg_non_cl(NPS_GIM_BLKID, 0x14A) - -#else - -.macro GET_CPU_ID reg - lr \reg, [CTOP_AUX_LOGIC_GLOBAL_ID] -#ifndef CONFIG_EZNPS_MTM_EXT - lsr \reg, \reg, 4 -#endif -.endm - -#endif /* __ASSEMBLY__ */ - -#endif /* _PLAT_EZNPS_CTOP_H */ diff --git a/arch/arc/plat-eznps/include/plat/mtm.h b/arch/arc/plat-eznps/include/plat/mtm.h deleted file mode 100644 index 7c55becc891b..000000000000 --- a/arch/arc/plat-eznps/include/plat/mtm.h +++ /dev/null @@ -1,49 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#ifndef _PLAT_EZNPS_MTM_H -#define _PLAT_EZNPS_MTM_H - -#include <plat/ctop.h> - -static inline void *nps_mtm_reg_addr(u32 cpu, u32 reg) -{ - struct global_id gid; - u32 core, blkid; - - gid.value = cpu; - core = gid.core; - blkid = (((core & 0x0C) << 2) | (core & 0x03)); - - return nps_host_reg(cpu, blkid, reg); -} - -#ifdef CONFIG_EZNPS_MTM_EXT -#define NPS_CPU_TO_THREAD_NUM(cpu) \ - ({ struct global_id gid; gid.value = cpu; gid.thread; }) - -/* MTM registers */ -#define MTM_CFG(cpu) nps_mtm_reg_addr(cpu, 0x81) -#define MTM_THR_INIT(cpu) nps_mtm_reg_addr(cpu, 0x92) -#define MTM_THR_INIT_STS(cpu) nps_mtm_reg_addr(cpu, 0x93) - -#define get_thread(map) map.thread -#define eznps_max_cpus 4096 -#define eznps_cpus_per_cluster 256 - -void mtm_enable_core(unsigned int cpu); -int mtm_enable_thread(int cpu); -#else /* !CONFIG_EZNPS_MTM_EXT */ - -#define get_thread(map) 0 -#define eznps_max_cpus 256 -#define eznps_cpus_per_cluster 16 -#define mtm_enable_core(cpu) -#define mtm_enable_thread(cpu) 1 -#define NPS_CPU_TO_THREAD_NUM(cpu) 0 - -#endif /* CONFIG_EZNPS_MTM_EXT */ - -#endif /* _PLAT_EZNPS_MTM_H */ diff --git a/arch/arc/plat-eznps/include/plat/smp.h b/arch/arc/plat-eznps/include/plat/smp.h deleted file mode 100644 index e433f118bdca..000000000000 --- a/arch/arc/plat-eznps/include/plat/smp.h +++ /dev/null @@ -1,15 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#ifndef __PLAT_EZNPS_SMP_H -#define __PLAT_EZNPS_SMP_H - -#ifdef CONFIG_SMP - -extern void res_service(void); - -#endif /* CONFIG_SMP */ - -#endif diff --git a/arch/arc/plat-eznps/mtm.c b/arch/arc/plat-eznps/mtm.c deleted file mode 100644 index 3dcf5a9e2976..000000000000 --- a/arch/arc/plat-eznps/mtm.c +++ /dev/null @@ -1,166 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#include <linux/smp.h> -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/io.h> -#include <linux/log2.h> -#include <asm/arcregs.h> -#include <plat/mtm.h> -#include <plat/smp.h> - -#define MT_HS_CNT_MIN 0x01 -#define MT_HS_CNT_MAX 0xFF -#define MT_CTRL_ST_CNT 0xF -#define NPS_NUM_HW_THREADS 0x10 - -static int mtm_hs_ctr = MT_HS_CNT_MAX; - -#ifdef CONFIG_EZNPS_MEM_ERROR_ALIGN -int do_memory_error(unsigned long address, struct pt_regs *regs) -{ - die("Invalid Mem Access", regs, address); - - return 1; -} -#endif - -static void mtm_init_nat(int cpu) -{ - struct nps_host_reg_mtm_cfg mtm_cfg; - struct nps_host_reg_aux_udmc udmc; - int log_nat, nat = 0, i, t; - - /* Iterate core threads and update nat */ - for (i = 0, t = cpu; i < NPS_NUM_HW_THREADS; i++, t++) - nat += test_bit(t, cpumask_bits(cpu_possible_mask)); - - log_nat = ilog2(nat); - - udmc.value = read_aux_reg(CTOP_AUX_UDMC); - udmc.nat = log_nat; - write_aux_reg(CTOP_AUX_UDMC, udmc.value); - - mtm_cfg.value = ioread32be(MTM_CFG(cpu)); - mtm_cfg.nat = log_nat; - iowrite32be(mtm_cfg.value, MTM_CFG(cpu)); -} - -static void mtm_init_thread(int cpu) -{ - int i, tries = 5; - struct nps_host_reg_thr_init thr_init; - struct nps_host_reg_thr_init_sts thr_init_sts; - - /* Set thread init register */ - thr_init.value = 0; - iowrite32be(thr_init.value, MTM_THR_INIT(cpu)); - thr_init.thr_id = NPS_CPU_TO_THREAD_NUM(cpu); - thr_init.str = 1; - iowrite32be(thr_init.value, MTM_THR_INIT(cpu)); - - /* Poll till thread init is done */ - for (i = 0; i < tries; i++) { - thr_init_sts.value = ioread32be(MTM_THR_INIT_STS(cpu)); - if (thr_init_sts.thr_id == thr_init.thr_id) { - if (thr_init_sts.bsy) - continue; - else if (thr_init_sts.err) - pr_warn("Failed to thread init cpu %u\n", cpu); - break; - } - - pr_warn("Wrong thread id in thread init for cpu %u\n", cpu); - break; - } - - if (i == tries) - pr_warn("Got thread init timeout for cpu %u\n", cpu); -} - -int mtm_enable_thread(int cpu) -{ - struct nps_host_reg_mtm_cfg mtm_cfg; - - if (NPS_CPU_TO_THREAD_NUM(cpu) == 0) - return 1; - - /* Enable thread in mtm */ - mtm_cfg.value = ioread32be(MTM_CFG(cpu)); - mtm_cfg.ten |= (1 << (NPS_CPU_TO_THREAD_NUM(cpu))); - iowrite32be(mtm_cfg.value, MTM_CFG(cpu)); - - return 0; -} - -void mtm_enable_core(unsigned int cpu) -{ - int i; - struct nps_host_reg_aux_mt_ctrl mt_ctrl; - struct nps_host_reg_mtm_cfg mtm_cfg; - struct nps_host_reg_aux_dpc dpc; - - /* - * Initializing dpc register in each CPU. - * Overwriting the init value of the DPC - * register so that CMEM and FMT virtual address - * spaces are accessible, and Data Plane HW - * facilities are enabled. - */ - dpc.ien = 1; - dpc.men = 1; - write_aux_reg(CTOP_AUX_DPC, dpc.value); - - if (NPS_CPU_TO_THREAD_NUM(cpu) != 0) - return; - - /* Initialize Number of Active Threads */ - mtm_init_nat(cpu); - - /* Initialize mtm_cfg */ - mtm_cfg.value = ioread32be(MTM_CFG(cpu)); - mtm_cfg.ten = 1; - iowrite32be(mtm_cfg.value, MTM_CFG(cpu)); - - /* Initialize all other threads in core */ - for (i = 1; i < NPS_NUM_HW_THREADS; i++) - mtm_init_thread(cpu + i); - - - /* Enable HW schedule, stall counter, mtm */ - mt_ctrl.value = 0; - mt_ctrl.hsen = 1; - mt_ctrl.hs_cnt = mtm_hs_ctr; - mt_ctrl.mten = 1; - write_aux_reg(CTOP_AUX_MT_CTRL, mt_ctrl.value); - - /* - * HW scheduling mechanism will start working - * Only after call to instruction "schd.rw". - * cpu_relax() calls "schd.rw" instruction. - */ - cpu_relax(); -} - -/* Verify and set the value of the mtm hs counter */ -static int __init set_mtm_hs_ctr(char *ctr_str) -{ - int hs_ctr; - int ret; - - ret = kstrtoint(ctr_str, 0, &hs_ctr); - - if (ret || hs_ctr > MT_HS_CNT_MAX || hs_ctr < MT_HS_CNT_MIN) { - pr_err("** Invalid @nps_mtm_hs_ctr [%d] needs to be [%d:%d] (incl)\n", - hs_ctr, MT_HS_CNT_MIN, MT_HS_CNT_MAX); - return -EINVAL; - } - - mtm_hs_ctr = hs_ctr; - - return 0; -} -early_param("nps_mtm_hs_ctr", set_mtm_hs_ctr); diff --git a/arch/arc/plat-eznps/platform.c b/arch/arc/plat-eznps/platform.c deleted file mode 100644 index 6de2fe840043..000000000000 --- a/arch/arc/plat-eznps/platform.c +++ /dev/null @@ -1,91 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#include <linux/init.h> -#include <linux/io.h> -#include <asm/mach_desc.h> -#include <plat/mtm.h> - -static void __init eznps_configure_msu(void) -{ - int cpu; - struct nps_host_reg_msu_en_cfg msu_en_cfg = {.value = 0}; - - msu_en_cfg.msu_en = 1; - msu_en_cfg.ipi_en = 1; - msu_en_cfg.gim_0_en = 1; - msu_en_cfg.gim_1_en = 1; - - /* enable IPI and GIM messages on all clusters */ - for (cpu = 0 ; cpu < eznps_max_cpus; cpu += eznps_cpus_per_cluster) - iowrite32be(msu_en_cfg.value, - nps_host_reg(cpu, NPS_MSU_BLKID, NPS_MSU_EN_CFG)); -} - -static void __init eznps_configure_gim(void) -{ - u32 reg_value; - u32 gim_int_lines; - struct nps_host_reg_gim_p_int_dst gim_p_int_dst = {.value = 0}; - - gim_int_lines = NPS_GIM_UART_LINE; - gim_int_lines |= NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE; - gim_int_lines |= NPS_GIM_DBG_LAN_EAST_RX_RDY_LINE; - gim_int_lines |= NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE; - gim_int_lines |= NPS_GIM_DBG_LAN_WEST_RX_RDY_LINE; - - /* - * IRQ polarity - * low or high level - * negative or positive edge - */ - reg_value = ioread32be(REG_GIM_P_INT_POL_0); - reg_value &= ~gim_int_lines; - iowrite32be(reg_value, REG_GIM_P_INT_POL_0); - - /* IRQ type level or edge */ - reg_value = ioread32be(REG_GIM_P_INT_SENS_0); - reg_value |= NPS_GIM_DBG_LAN_EAST_TX_DONE_LINE; - reg_value |= NPS_GIM_DBG_LAN_WEST_TX_DONE_LINE; - iowrite32be(reg_value, REG_GIM_P_INT_SENS_0); - - /* - * GIM interrupt select type for - * dbg_lan TX and RX interrupts - * should be type 1 - * type 0 = IRQ line 6 - * type 1 = IRQ line 7 - */ - gim_p_int_dst.is = 1; - iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_10); - iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_11); - iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_25); - iowrite32be(gim_p_int_dst.value, REG_GIM_P_INT_DST_26); - - /* - * CTOP IRQ lines should be defined - * as blocking in GIM - */ - iowrite32be(gim_int_lines, REG_GIM_P_INT_BLK_0); - - /* enable CTOP IRQ lines in GIM */ - iowrite32be(gim_int_lines, REG_GIM_P_INT_EN_0); -} - -static void __init eznps_early_init(void) -{ - eznps_configure_msu(); - eznps_configure_gim(); -} - -static const char *eznps_compat[] __initconst = { - "ezchip,arc-nps", - NULL, -}; - -MACHINE_START(NPS, "nps") - .dt_compat = eznps_compat, - .init_early = eznps_early_init, -MACHINE_END diff --git a/arch/arc/plat-eznps/smp.c b/arch/arc/plat-eznps/smp.c deleted file mode 100644 index f119cb7de2ae..000000000000 --- a/arch/arc/plat-eznps/smp.c +++ /dev/null @@ -1,138 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0-only -/* - * Copyright(c) 2015 EZchip Technologies. - */ - -#include <linux/smp.h> -#include <linux/of_fdt.h> -#include <linux/io.h> -#include <linux/irqdomain.h> -#include <asm/irq.h> -#include <plat/ctop.h> -#include <plat/smp.h> -#include <plat/mtm.h> - -#define NPS_DEFAULT_MSID 0x34 -#define NPS_MTM_CPU_CFG 0x90 - -static char smp_cpuinfo_buf[128] = {"Extn [EZNPS-SMP]\t: On\n"}; - -/* Get cpu map from device tree */ -static int __init eznps_get_map(const char *name, struct cpumask *cpumask) -{ - unsigned long dt_root = of_get_flat_dt_root(); - const char *buf; - - buf = of_get_flat_dt_prop(dt_root, name, NULL); - if (!buf) - return 1; - - cpulist_parse(buf, cpumask); - - return 0; -} - -/* Update board cpu maps */ -static void __init eznps_init_cpumasks(void) -{ - struct cpumask cpumask; - - if (eznps_get_map("present-cpus", &cpumask)) { - pr_err("Failed to get present-cpus from dtb"); - return; - } - init_cpu_present(&cpumask); - - if (eznps_get_map("possible-cpus", &cpumask)) { - pr_err("Failed to get possible-cpus from dtb"); - return; - } - init_cpu_possible(&cpumask); -} - -static void eznps_init_core(unsigned int cpu) -{ - u32 sync_value; - struct nps_host_reg_aux_hw_comply hw_comply; - struct nps_host_reg_aux_lpc lpc; - - if (NPS_CPU_TO_THREAD_NUM(cpu) != 0) - return; - - hw_comply.value = read_aux_reg(CTOP_AUX_HW_COMPLY); - hw_comply.me = 1; - hw_comply.le = 1; - hw_comply.te = 1; - write_aux_reg(CTOP_AUX_HW_COMPLY, hw_comply.value); - - /* Enable MMU clock */ - lpc.mep = 1; - write_aux_reg(CTOP_AUX_LPC, lpc.value); - - /* Boot CPU only */ - if (!cpu) { - /* Write to general purpose register in CRG */ - sync_value = ioread32be(REG_GEN_PURP_0); - sync_value |= NPS_CRG_SYNC_BIT; - iowrite32be(sync_value, REG_GEN_PURP_0); - } -} - -/* - * Master kick starting another CPU - */ -static void __init eznps_smp_wakeup_cpu(int cpu, unsigned long pc) -{ - struct nps_host_reg_mtm_cpu_cfg cpu_cfg; - - if (mtm_enable_thread(cpu) == 0) - return; - - /* set PC, dmsid, and start CPU */ - cpu_cfg.value = (u32)res_service; - cpu_cfg.dmsid = NPS_DEFAULT_MSID; - cpu_cfg.cs = 1; - iowrite32be(cpu_cfg.value, nps_mtm_reg_addr(cpu, NPS_MTM_CPU_CFG)); -} - -static void eznps_ipi_send(int cpu) -{ - struct global_id gid; - struct { - union { - struct { - u32 num:8, cluster:8, core:8, thread:8; - }; - u32 value; - }; - } ipi; - - gid.value = cpu; - ipi.thread = get_thread(gid); - ipi.core = gid.core; - ipi.cluster = nps_cluster_logic_to_phys(gid.cluster); - ipi.num = NPS_IPI_IRQ; - - __asm__ __volatile__( - " mov r3, %0\n" - " .word %1\n" - : - : "r"(ipi.value), "i"(CTOP_INST_ASRI_0_R3) - : "r3"); -} - -static void eznps_init_per_cpu(int cpu) -{ - smp_ipi_irq_setup(cpu, NPS_IPI_IRQ); - - eznps_init_core(cpu); - mtm_enable_core(cpu); -} - -struct plat_smp_ops plat_smp_ops = { - .info = smp_cpuinfo_buf, - .init_early_smp = eznps_init_cpumasks, - .cpu_kick = eznps_smp_wakeup_cpu, - .ipi_send = eznps_ipi_send, - .init_per_cpu = eznps_init_per_cpu, -}; |