diff options
Diffstat (limited to 'arch/arm/mach-qcom')
| -rw-r--r-- | arch/arm/mach-qcom/Kconfig | 3 | ||||
| -rw-r--r-- | arch/arm/mach-qcom/Makefile | 3 | ||||
| -rw-r--r-- | arch/arm/mach-qcom/platsmp.c | 2 | ||||
| -rw-r--r-- | arch/arm/mach-qcom/scm.c | 344 | ||||
| -rw-r--r-- | arch/arm/mach-qcom/scm.h | 29 |
5 files changed, 1 insertions, 380 deletions
diff --git a/arch/arm/mach-qcom/Kconfig b/arch/arm/mach-qcom/Kconfig index 48003ea..2256cd1 100644 --- a/arch/arm/mach-qcom/Kconfig +++ b/arch/arm/mach-qcom/Kconfig @@ -22,7 +22,4 @@ config ARCH_MSM8974 bool "Enable support for MSM8974" select HAVE_ARM_ARCH_TIMER -config QCOM_SCM - bool - endif diff --git a/arch/arm/mach-qcom/Makefile b/arch/arm/mach-qcom/Makefile index 10b6841..e324375 100644 --- a/arch/arm/mach-qcom/Makefile +++ b/arch/arm/mach-qcom/Makefile @@ -1,5 +1,2 @@ obj-y := board.o obj-$(CONFIG_SMP) += platsmp.o -obj-$(CONFIG_QCOM_SCM) += scm.o - -CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1) diff --git a/arch/arm/mach-qcom/platsmp.c b/arch/arm/mach-qcom/platsmp.c index 596e623..4b67e56 100644 --- a/arch/arm/mach-qcom/platsmp.c +++ b/arch/arm/mach-qcom/platsmp.c @@ -17,10 +17,10 @@ #include <linux/of_address.h> #include <linux/smp.h> #include <linux/io.h> +#include <linux/qcom_scm.h> #include <asm/smp_plat.h> -#include "scm.h" #define VDD_SC1_ARRAY_CLAMP_GFS_CTL 0x35a0 #define SCSS_CPU1CORE_RESET 0x2d80 diff --git a/arch/arm/mach-qcom/scm.c b/arch/arm/mach-qcom/scm.c deleted file mode 100644 index 3e0e334..0000000 --- a/arch/arm/mach-qcom/scm.c +++ /dev/null @@ -1,344 +0,0 @@ -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA - * 02110-1301, USA. - */ - -#include <linux/slab.h> -#include <linux/io.h> -#include <linux/module.h> -#include <linux/mutex.h> -#include <linux/errno.h> -#include <linux/err.h> - -#include <asm/outercache.h> -#include <asm/cacheflush.h> - -#include "scm.h" - -#define QCOM_SCM_ENOMEM -5 -#define QCOM_SCM_EOPNOTSUPP -4 -#define QCOM_SCM_EINVAL_ADDR -3 -#define QCOM_SCM_EINVAL_ARG -2 -#define QCOM_SCM_ERROR -1 -#define QCOM_SCM_INTERRUPTED 1 - -static DEFINE_MUTEX(qcom_scm_lock); - -/** - * struct qcom_scm_command - one SCM command buffer - * @len: total available memory for command and response - * @buf_offset: start of command buffer - * @resp_hdr_offset: start of response buffer - * @id: command to be executed - * @buf: buffer returned from qcom_scm_get_command_buffer() - * - * An SCM command is laid out in memory as follows: - * - * ------------------- <--- struct qcom_scm_command - * | command header | - * ------------------- <--- qcom_scm_get_command_buffer() - * | command buffer | - * ------------------- <--- struct qcom_scm_response and - * | response header | qcom_scm_command_to_response() - * ------------------- <--- qcom_scm_get_response_buffer() - * | response buffer | - * ------------------- - * - * There can be arbitrary padding between the headers and buffers so - * you should always use the appropriate qcom_scm_get_*_buffer() routines - * to access the buffers in a safe manner. - */ -struct qcom_scm_command { - __le32 len; - __le32 buf_offset; - __le32 resp_hdr_offset; - __le32 id; - __le32 buf[0]; -}; - -/** - * struct qcom_scm_response - one SCM response buffer - * @len: total available memory for response - * @buf_offset: start of response data relative to start of qcom_scm_response - * @is_complete: indicates if the command has finished processing - */ -struct qcom_scm_response { - __le32 len; - __le32 buf_offset; - __le32 is_complete; -}; - -/** - * alloc_qcom_scm_command() - Allocate an SCM command - * @cmd_size: size of the command buffer - * @resp_size: size of the response buffer - * - * Allocate an SCM command, including enough room for the command - * and response headers as well as the command and response buffers. - * - * Returns a valid &qcom_scm_command on success or %NULL if the allocation fails. - */ -static struct qcom_scm_command *alloc_qcom_scm_command(size_t cmd_size, size_t resp_size) -{ - struct qcom_scm_command *cmd; - size_t len = sizeof(*cmd) + sizeof(struct qcom_scm_response) + cmd_size + - resp_size; - u32 offset; - - cmd = kzalloc(PAGE_ALIGN(len), GFP_KERNEL); - if (cmd) { - cmd->len = cpu_to_le32(len); - offset = offsetof(struct qcom_scm_command, buf); - cmd->buf_offset = cpu_to_le32(offset); - cmd->resp_hdr_offset = cpu_to_le32(offset + cmd_size); - } - return cmd; -} - -/** - * free_qcom_scm_command() - Free an SCM command - * @cmd: command to free - * - * Free an SCM command. - */ -static inline void free_qcom_scm_command(struct qcom_scm_command *cmd) -{ - kfree(cmd); -} - -/** - * qcom_scm_command_to_response() - Get a pointer to a qcom_scm_response - * @cmd: command - * - * Returns a pointer to a response for a command. - */ -static inline struct qcom_scm_response *qcom_scm_command_to_response( - const struct qcom_scm_command *cmd) -{ - return (void *)cmd + le32_to_cpu(cmd->resp_hdr_offset); -} - -/** - * qcom_scm_get_command_buffer() - Get a pointer to a command buffer - * @cmd: command - * - * Returns a pointer to the command buffer of a command. - */ -static inline void *qcom_scm_get_command_buffer(const struct qcom_scm_command *cmd) -{ - return (void *)cmd->buf; -} - -/** - * qcom_scm_get_response_buffer() - Get a pointer to a response buffer - * @rsp: response - * - * Returns a pointer to a response buffer of a response. - */ -static inline void *qcom_scm_get_response_buffer(const struct qcom_scm_response *rsp) -{ - return (void *)rsp + le32_to_cpu(rsp->buf_offset); -} - -static int qcom_scm_remap_error(int err) -{ - pr_err("qcom_scm_call failed with error code %d\n", err); - switch (err) { - case QCOM_SCM_ERROR: - return -EIO; - case QCOM_SCM_EINVAL_ADDR: - case QCOM_SCM_EINVAL_ARG: - return -EINVAL; - case QCOM_SCM_EOPNOTSUPP: - return -EOPNOTSUPP; - case QCOM_SCM_ENOMEM: - return -ENOMEM; - } - return -EINVAL; -} - -static u32 smc(u32 cmd_addr) -{ - int context_id; - register u32 r0 asm("r0") = 1; - register u32 r1 asm("r1") = (u32)&context_id; - register u32 r2 asm("r2") = cmd_addr; - do { - asm volatile( - __asmeq("%0", "r0") - __asmeq("%1", "r0") - __asmeq("%2", "r1") - __asmeq("%3", "r2") -#ifdef REQUIRES_SEC - ".arch_extension sec\n" -#endif - "smc #0 @ switch to secure world\n" - : "=r" (r0) - : "r" (r0), "r" (r1), "r" (r2) - : "r3"); - } while (r0 == QCOM_SCM_INTERRUPTED); - - return r0; -} - -static int __qcom_scm_call(const struct qcom_scm_command *cmd) -{ - int ret; - u32 cmd_addr = virt_to_phys(cmd); - - /* - * Flush the command buffer so that the secure world sees - * the correct data. - */ - __cpuc_flush_dcache_area((void *)cmd, cmd->len); - outer_flush_range(cmd_addr, cmd_addr + cmd->len); - - ret = smc(cmd_addr); - if (ret < 0) - ret = qcom_scm_remap_error(ret); - - return ret; -} - -static void qcom_scm_inv_range(unsigned long start, unsigned long end) -{ - u32 cacheline_size, ctr; - - asm volatile("mrc p15, 0, %0, c0, c0, 1" : "=r" (ctr)); - cacheline_size = 4 << ((ctr >> 16) & 0xf); - - start = round_down(start, cacheline_size); - end = round_up(end, cacheline_size); - outer_inv_range(start, end); - while (start < end) { - asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start) - : "memory"); - start += cacheline_size; - } - dsb(); - isb(); -} - -/** - * qcom_scm_call() - Send an SCM command - * @svc_id: service identifier - * @cmd_id: command identifier - * @cmd_buf: command buffer - * @cmd_len: length of the command buffer - * @resp_buf: response buffer - * @resp_len: length of the response buffer - * - * Sends a command to the SCM and waits for the command to finish processing. - * - * A note on cache maintenance: - * Note that any buffers that are expected to be accessed by the secure world - * must be flushed before invoking qcom_scm_call and invalidated in the cache - * immediately after qcom_scm_call returns. Cache maintenance on the command - * and response buffers is taken care of by qcom_scm_call; however, callers are - * responsible for any other cached buffers passed over to the secure world. - */ -static int qcom_scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, - size_t cmd_len, void *resp_buf, size_t resp_len) -{ - int ret; - struct qcom_scm_command *cmd; - struct qcom_scm_response *rsp; - unsigned long start, end; - - cmd = alloc_qcom_scm_command(cmd_len, resp_len); - if (!cmd) - return -ENOMEM; - - cmd->id = cpu_to_le32((svc_id << 10) | cmd_id); - if (cmd_buf) - memcpy(qcom_scm_get_command_buffer(cmd), cmd_buf, cmd_len); - - mutex_lock(&qcom_scm_lock); - ret = __qcom_scm_call(cmd); - mutex_unlock(&qcom_scm_lock); - if (ret) - goto out; - - rsp = qcom_scm_command_to_response(cmd); - start = (unsigned long)rsp; - - do { - qcom_scm_inv_range(start, start + sizeof(*rsp)); - } while (!rsp->is_complete); - - end = (unsigned long)qcom_scm_get_response_buffer(rsp) + resp_len; - qcom_scm_inv_range(start, end); - - if (resp_buf) - memcpy(resp_buf, qcom_scm_get_response_buffer(rsp), resp_len); -out: - free_qcom_scm_command(cmd); - return ret; -} - -u32 qcom_scm_get_version(void) -{ - int context_id; - static u32 version = -1; - register u32 r0 asm("r0"); - register u32 r1 asm("r1"); - - if (version != -1) - return version; - - mutex_lock(&qcom_scm_lock); - - r0 = 0x1 << 8; - r1 = (u32)&context_id; - do { - asm volatile( - __asmeq("%0", "r0") - __asmeq("%1", "r1") - __asmeq("%2", "r0") - __asmeq("%3", "r1") -#ifdef REQUIRES_SEC - ".arch_extension sec\n" -#endif - "smc #0 @ switch to secure world\n" - : "=r" (r0), "=r" (r1) - : "r" (r0), "r" (r1) - : "r2", "r3"); - } while (r0 == QCOM_SCM_INTERRUPTED); - - version = r1; - mutex_unlock(&qcom_scm_lock); - - return version; -} -EXPORT_SYMBOL(qcom_scm_get_version); - -#define QCOM_SCM_SVC_BOOT 0x1 -#define QCOM_SCM_BOOT_ADDR 0x1 -/* - * Set the cold/warm boot address for one of the CPU cores. - */ -int qcom_scm_set_boot_addr(u32 addr, int flags) -{ - struct { - __le32 flags; - __le32 addr; - } cmd; - - cmd.addr = cpu_to_le32(addr); - cmd.flags = cpu_to_le32(flags); - return qcom_scm_call(QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_ADDR, - &cmd, sizeof(cmd), NULL, 0); -} -EXPORT_SYMBOL(qcom_scm_set_boot_addr); diff --git a/arch/arm/mach-qcom/scm.h b/arch/arm/mach-qcom/scm.h deleted file mode 100644 index 6bb84cf..0000000 --- a/arch/arm/mach-qcom/scm.h +++ /dev/null @@ -1,29 +0,0 @@ -/* Copyright (c) 2010, Code Aurora Forum. All rights reserved. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 and - * only version 2 as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ -#ifndef __QCOM_SCM_H -#define __QCOM_SCM_H - -#define QCOM_SCM_FLAG_COLDBOOT_CPU1 0x01 -#define QCOM_SCM_FLAG_COLDBOOT_CPU2 0x08 -#define QCOM_SCM_FLAG_COLDBOOT_CPU3 0x20 -#define QCOM_SCM_FLAG_WARMBOOT_CPU0 0x04 -#define QCOM_SCM_FLAG_WARMBOOT_CPU1 0x02 -#define QCOM_SCM_FLAG_WARMBOOT_CPU2 0x10 -#define QCOM_SCM_FLAG_WARMBOOT_CPU3 0x40 - -extern int qcom_scm_set_boot_addr(u32 addr, int flags); - -#define QCOM_SCM_VERSION(major, minor) (((major) << 16) | ((minor) & 0xFF)) - -extern u32 qcom_scm_get_version(void); - -#endif |
