diff options
| -rw-r--r-- | arch/arm/imx-common/Kconfig | 8 | ||||
| -rw-r--r-- | arch/arm/imx-common/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/imx-common/rdc-sema.c | 183 | ||||
| -rw-r--r-- | arch/arm/include/asm/arch-mx6/imx-rdc.h | 12 | ||||
| -rw-r--r-- | arch/arm/include/asm/imx-common/rdc-sema.h | 100 |
5 files changed, 304 insertions, 0 deletions
diff --git a/arch/arm/imx-common/Kconfig b/arch/arm/imx-common/Kconfig index 229623922..c4f48bb 100644 --- a/arch/arm/imx-common/Kconfig +++ b/arch/arm/imx-common/Kconfig @@ -3,3 +3,11 @@ config IMX_CONFIG config ROM_UNIFIED_SECTIONS bool + +config IMX_RDC + bool "i.MX Resource domain controller driver" + depends on ARCH_MX6 || ARCH_MX7 + help + i.MX Resource domain controller is used to assign masters + and peripherals to differet domains. This can be used to + isolate resources. diff --git a/arch/arm/imx-common/Makefile b/arch/arm/imx-common/Makefile index e7190c3..568f41c 100644 --- a/arch/arm/imx-common/Makefile +++ b/arch/arm/imx-common/Makefile @@ -27,6 +27,7 @@ ifeq ($(SOC),$(filter $(SOC),mx6 mx7)) obj-y += cache.o init.o obj-$(CONFIG_CMD_SATA) += sata.o obj-$(CONFIG_IMX_VIDEO_SKIP) += video.o +obj-$(CONFIG_IMX_RDC) += rdc-sema.o obj-$(CONFIG_SECURE_BOOT) += hab.o endif ifeq ($(SOC),$(filter $(SOC),vf610)) diff --git a/arch/arm/imx-common/rdc-sema.c b/arch/arm/imx-common/rdc-sema.c new file mode 100644 index 0000000..dcb5c41 --- /dev/null +++ b/arch/arm/imx-common/rdc-sema.c @@ -0,0 +1,183 @@ +/* + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ +#include <common.h> +#include <asm/io.h> +#include <asm/arch/imx-regs.h> +#include <asm/imx-common/rdc-sema.h> +#include <asm/arch/imx-rdc.h> +#include <asm-generic/errno.h> + +/* + * Check if the RDC Semaphore is required for this peripheral. + */ +static inline int imx_rdc_check_sema_required(int per_id) +{ + struct rdc_regs *imx_rdc = (struct rdc_regs *)RDC_BASE_ADDR; + u32 reg; + + reg = readl(&imx_rdc->pdap[per_id]); + /* + * No semaphore: + * Intial value or this peripheral is assigned to only one domain + */ + if (!(reg & RDC_PDAP_SREQ_MASK)) + return -ENOENT; + + return 0; +} + +/* + * Check the peripheral read / write access permission on Domain [dom_id]. + */ +int imx_rdc_check_permission(int per_id, int dom_id) +{ + struct rdc_regs *imx_rdc = (struct rdc_regs *)RDC_BASE_ADDR; + u32 reg; + + reg = readl(&imx_rdc->pdap[per_id]); + if (!(reg & RDC_PDAP_DRW_MASK(dom_id))) + return -EACCES; /*No access*/ + + return 0; +} + +/* + * Lock up the RDC semaphore for this peripheral if semaphore is required. + */ +int imx_rdc_sema_lock(int per_id) +{ + struct rdc_sema_regs *imx_rdc_sema; + int ret; + u8 reg; + + ret = imx_rdc_check_sema_required(per_id); + if (ret) + return ret; + + if (per_id < SEMA_GATES_NUM) + imx_rdc_sema = (struct rdc_sema_regs *)SEMAPHORE1_BASE_ADDR; + else + imx_rdc_sema = (struct rdc_sema_regs *)SEMAPHORE2_BASE_ADDR; + + do { + writeb(RDC_SEMA_PROC_ID, + &imx_rdc_sema->gate[per_id % SEMA_GATES_NUM]); + reg = readb(&imx_rdc_sema->gate[per_id % SEMA_GATES_NUM]); + if ((reg & RDC_SEMA_GATE_GTFSM_MASK) == RDC_SEMA_PROC_ID) + break; /* Get the Semaphore*/ + } while (1); + + return 0; +} + +/* + * Unlock the RDC semaphore for this peripheral if main CPU is the + * semaphore owner. + */ +int imx_rdc_sema_unlock(int per_id) +{ + struct rdc_sema_regs *imx_rdc_sema; + int ret; + u8 reg; + + ret = imx_rdc_check_sema_required(per_id); + if (ret) + return ret; + + if (per_id < SEMA_GATES_NUM) + imx_rdc_sema = (struct rdc_sema_regs *)SEMAPHORE1_BASE_ADDR; + else + imx_rdc_sema = (struct rdc_sema_regs *)SEMAPHORE2_BASE_ADDR; + + reg = readb(&imx_rdc_sema->gate[per_id % SEMA_GATES_NUM]); + if ((reg & RDC_SEMA_GATE_GTFSM_MASK) != RDC_SEMA_PROC_ID) + return 1; /*Not the semaphore owner */ + + writeb(0x0, &imx_rdc_sema->gate[per_id % SEMA_GATES_NUM]); + + return 0; +} + +/* + * Setup RDC setting for one peripheral + */ +int imx_rdc_setup_peri(rdc_peri_cfg_t p) +{ + struct rdc_regs *imx_rdc = (struct rdc_regs *)RDC_BASE_ADDR; + u32 reg = 0; + u32 share_count = 0; + u32 peri_id = p & RDC_PERI_MASK; + u32 domain = (p & RDC_DOMAIN_MASK) >> RDC_DOMAIN_SHIFT_BASE; + + /* No domain assigned */ + if (domain == 0) + return -EINVAL; + + reg |= domain; + + share_count = (domain & 0x3) + + ((domain >> 2) & 0x3) + + ((domain >> 4) & 0x3) + + ((domain >> 6) & 0x3); + + if (share_count > 0x3) + reg |= RDC_PDAP_SREQ_MASK; + + writel(reg, &imx_rdc->pdap[peri_id]); + + return 0; +} + +/* + * Setup RDC settings for multiple peripherals + */ +int imx_rdc_setup_peripherals(rdc_peri_cfg_t const *peripherals_list, + unsigned count) +{ + rdc_peri_cfg_t const *p = peripherals_list; + int i, ret; + + for (i = 0; i < count; i++) { + ret = imx_rdc_setup_peri(*p); + if (ret) + return ret; + p++; + } + + return 0; +} + +/* + * Setup RDC setting for one master + */ +int imx_rdc_setup_ma(rdc_ma_cfg_t p) +{ + struct rdc_regs *imx_rdc = (struct rdc_regs *)RDC_BASE_ADDR; + u32 master_id = (p & RDC_MASTER_MASK) >> RDC_MASTER_SHIFT; + u32 domain = (p & RDC_DOMAIN_MASK) >> RDC_DOMAIN_SHIFT_BASE; + + writel((domain & RDC_MDA_DID_MASK), &imx_rdc->mda[master_id]); + + return 0; +} + +/* + * Setup RDC settings for multiple masters + */ +int imx_rdc_setup_masters(rdc_ma_cfg_t const *masters_list, unsigned count) +{ + rdc_ma_cfg_t const *p = masters_list; + int i, ret; + + for (i = 0; i < count; i++) { + ret = imx_rdc_setup_ma(*p); + if (ret) + return ret; + p++; + } + + return 0; +} diff --git a/arch/arm/include/asm/arch-mx6/imx-rdc.h b/arch/arm/include/asm/arch-mx6/imx-rdc.h new file mode 100644 index 0000000..5754f04 --- /dev/null +++ b/arch/arm/include/asm/arch-mx6/imx-rdc.h @@ -0,0 +1,12 @@ +/* + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __IMX_RDC_H__ +#define __IMX_RDC_H__ + +#error "Please select cpu" + +#endif /* __IMX_RDC_H__*/ diff --git a/arch/arm/include/asm/imx-common/rdc-sema.h b/arch/arm/include/asm/imx-common/rdc-sema.h new file mode 100644 index 0000000..2c61e56 --- /dev/null +++ b/arch/arm/include/asm/imx-common/rdc-sema.h @@ -0,0 +1,100 @@ +/* + * Copyright (C) 2016 Freescale Semiconductor, Inc. + * + * SPDX-License-Identifier: GPL-2.0+ + */ + +#ifndef __RDC_SEMA_H__ +#define __RDC_SEMA_H__ + +/* + * rdc_peri_cfg_t and rdc_ma_cft_t use the same layout. + * + * [ 23 22 | 21 20 | 19 18 | 17 16 ] | [ 15 - 8 ] | [ 7 - 0 ] + * d3 d2 d1 d0 | master id | peri id + * d[x] means domain[x], x can be [3 - 0]. + */ +typedef u32 rdc_peri_cfg_t; +typedef u32 rdc_ma_cfg_t; + +#define RDC_PERI_SHIFT 0 +#define RDC_PERI_MASK 0xFF + +#define RDC_DOMAIN_SHIFT_BASE 16 +#define RDC_DOMAIN_MASK 0xFF0000 +#define RDC_DOMAIN_SHIFT(x) (RDC_DOMAIN_SHIFT_BASE + ((x << 1))) +#define RDC_DOMAIN(x) ((rdc_peri_cfg_t)(0x3 << RDC_DOMAIN_SHIFT(x))) + +#define RDC_MASTER_SHIFT 8 +#define RDC_MASTER_MASK 0xFF00 +#define RDC_MASTER_CFG(master_id, domain_id) (rdc_ma_cfg_t)((master_id << 8) | \ + (domain_id << RDC_DOMAIN_SHIFT_BASE)) + +/* The Following macro definitions are common to i.MX6SX and i.MX7D */ +#define SEMA_GATES_NUM 64 + +#define RDC_MDA_DID_SHIFT 0 +#define RDC_MDA_DID_MASK (0x3 << RDC_MDA_DID_SHIFT) +#define RDC_MDA_LCK_SHIFT 31 +#define RDC_MDA_LCK_MASK (0x1 << RDC_MDA_LCK_SHIFT) + +#define RDC_PDAP_DW_SHIFT(domain) ((domain) << 1) +#define RDC_PDAP_DR_SHIFT(domain) (1 + RDC_PDAP_DW_SHIFT(domain)) +#define RDC_PDAP_DW_MASK(domain) (1 << RDC_PDAP_DW_SHIFT(domain)) +#define RDC_PDAP_DR_MASK(domain) (1 << RDC_PDAP_DR_SHIFT(domain)) +#define RDC_PDAP_DRW_MASK(domain) (RDC_PDAP_DW_MASK(domain) | \ + RDC_PDAP_DR_MASK(domain)) + +#define RDC_PDAP_SREQ_SHIFT 30 +#define RDC_PDAP_SREQ_MASK (0x1 << RDC_PDAP_SREQ_SHIFT) +#define RDC_PDAP_LCK_SHIFT 31 +#define RDC_PDAP_LCK_MASK (0x1 << RDC_PDAP_LCK_SHIFT) + +#define RDC_MRSA_SADR_SHIFT 7 +#define RDC_MRSA_SADR_MASK (0x1ffffff << RDC_MRSA_SADR_SHIFT) + +#define RDC_MREA_EADR_SHIFT 7 +#define RDC_MREA_EADR_MASK (0x1ffffff << RDC_MREA_EADR_SHIFT) + +#define RDC_MRC_DW_SHIFT(domain) (domain) +#define RDC_MRC_DR_SHIFT(domain) (1 + RDC_MRC_DW_SHIFT(domain)) +#define RDC_MRC_DW_MASK(domain) (1 << RDC_MRC_DW_SHIFT(domain)) +#define RDC_MRC_DR_MASK(domain) (1 << RDC_MRC_DR_SHIFT(domain)) +#define RDC_MRC_DRW_MASK(domain) (RDC_MRC_DW_MASK(domain) | \ + RDC_MRC_DR_MASK(domain)) +#define RDC_MRC_ENA_SHIFT 30 +#define RDC_MRC_ENA_MASK (0x1 << RDC_MRC_ENA_SHIFT) +#define RDC_MRC_LCK_SHIFT 31 +#define RDC_MRC_LCK_MASK (0x1 << RDC_MRC_LCK_SHIFT) + +#define RDC_MRVS_VDID_SHIFT 0 +#define RDC_MRVS_VDID_MASK (0x3 << RDC_MRVS_VDID_SHIFT) +#define RDC_MRVS_AD_SHIFT 4 +#define RDC_MRVS_AD_MASK (0x1 << RDC_MRVS_AD_SHIFT) +#define RDC_MRVS_VADDR_SHIFT 5 +#define RDC_MRVS_VADDR_MASK (0x7ffffff << RDC_MRVS_VADDR_SHIFT) + +#define RDC_SEMA_GATE_GTFSM_SHIFT 0 +#define RDC_SEMA_GATE_GTFSM_MASK (0xf << RDC_SEMA_GATE_GTFSM_SHIFT) +#define RDC_SEMA_GATE_LDOM_SHIFT 5 +#define RDC_SEMA_GATE_LDOM_MASK (0x3 << RDC_SEMA_GATE_LDOM_SHIFT) + +#define RDC_SEMA_RSTGT_RSTGDP_SHIFT 0 +#define RDC_SEMA_RSTGT_RSTGDP_MASK (0xff << RDC_SEMA_RSTGT_RSTGDP_SHIFT) +#define RDC_SEMA_RSTGT_RSTGSM_SHIFT 2 +#define RDC_SEMA_RSTGT_RSTGSM_MASK (0x3 << RDC_SEMA_RSTGT_RSTGSM_SHIFT) +#define RDC_SEMA_RSTGT_RSTGMS_SHIFT 4 +#define RDC_SEMA_RSTGT_RSTGMS_MASK (0xf << RDC_SEMA_RSTGT_RSTGMS_SHIFT) +#define RDC_SEMA_RSTGT_RSTGTN_SHIFT 8 +#define RDC_SEMA_RSTGT_RSTGTN_MASK (0xff << RDC_SEMA_RSTGT_RSTGTN_SHIFT) + +int imx_rdc_check_permission(int per_id, int dom_id); +int imx_rdc_sema_lock(int per_id); +int imx_rdc_sema_unlock(int per_id); +int imx_rdc_setup_peri(rdc_peri_cfg_t p); +int imx_rdc_setup_peripherals(rdc_peri_cfg_t const *peripherals_list, + unsigned count); +int imx_rdc_setup_ma(rdc_ma_cfg_t p); +int imx_rdc_setup_masters(rdc_ma_cfg_t const *masters_list, unsigned count); + +#endif /* __RDC_SEMA_H__*/ |