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-rw-r--r--arch/arm/mach-qcom/Kconfig33
-rw-r--r--arch/arm/mach-qcom/Makefile5
-rw-r--r--arch/arm/mach-qcom/board.c40
-rw-r--r--arch/arm/mach-qcom/platsmp.c137
-rw-r--r--arch/arm/mach-qcom/scm-boot.c39
-rw-r--r--arch/arm/mach-qcom/scm-boot.h22
-rw-r--r--arch/arm/mach-qcom/scm.c299
-rw-r--r--arch/arm/mach-qcom/scm.h25
8 files changed, 600 insertions, 0 deletions
diff --git a/arch/arm/mach-qcom/Kconfig b/arch/arm/mach-qcom/Kconfig
new file mode 100644
index 000000000000..a028be234334
--- /dev/null
+++ b/arch/arm/mach-qcom/Kconfig
@@ -0,0 +1,33 @@
1config ARCH_QCOM
2 bool "Qualcomm Support" if ARCH_MULTI_V7
3 select ARCH_REQUIRE_GPIOLIB
4 select ARM_GIC
5 select CLKSRC_OF
6 select GENERIC_CLOCKEVENTS
7 select HAVE_SMP
8 select QCOM_SCM if SMP
9 help
10 Support for Qualcomm's devicetree based systems.
11
12if ARCH_QCOM
13
14menu "Qualcomm SoC Selection"
15
16config ARCH_MSM8X60
17 bool "Enable support for MSM8X60"
18 select CLKSRC_QCOM
19
20config ARCH_MSM8960
21 bool "Enable support for MSM8960"
22 select CLKSRC_QCOM
23
24config ARCH_MSM8974
25 bool "Enable support for MSM8974"
26 select HAVE_ARM_ARCH_TIMER
27
28endmenu
29
30config QCOM_SCM
31 bool
32
33endif
diff --git a/arch/arm/mach-qcom/Makefile b/arch/arm/mach-qcom/Makefile
new file mode 100644
index 000000000000..8f756ae1ae31
--- /dev/null
+++ b/arch/arm/mach-qcom/Makefile
@@ -0,0 +1,5 @@
1obj-y := board.o
2obj-$(CONFIG_SMP) += platsmp.o
3obj-$(CONFIG_QCOM_SCM) += scm.o scm-boot.o
4
5CFLAGS_scm.o :=$(call as-instr,.arch_extension sec,-DREQUIRES_SEC=1)
diff --git a/arch/arm/mach-qcom/board.c b/arch/arm/mach-qcom/board.c
new file mode 100644
index 000000000000..830f69c3a3ce
--- /dev/null
+++ b/arch/arm/mach-qcom/board.c
@@ -0,0 +1,40 @@
1/* Copyright (c) 2010-2014 The Linux Foundation. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12
13#include <linux/init.h>
14#include <linux/of.h>
15#include <linux/of_platform.h>
16
17#include <asm/mach/arch.h>
18#include <asm/mach/map.h>
19
20extern struct smp_operations qcom_smp_ops;
21
22static const char * const qcom_dt_match[] __initconst = {
23 "qcom,msm8660-surf",
24 "qcom,msm8960-cdp",
25 NULL
26};
27
28static const char * const apq8074_dt_match[] __initconst = {
29 "qcom,apq8074-dragonboard",
30 NULL
31};
32
33DT_MACHINE_START(QCOM_DT, "Qualcomm (Flattened Device Tree)")
34 .smp = smp_ops(qcom_smp_ops),
35 .dt_compat = qcom_dt_match,
36MACHINE_END
37
38DT_MACHINE_START(APQ_DT, "Qualcomm (Flattened Device Tree)")
39 .dt_compat = apq8074_dt_match,
40MACHINE_END
diff --git a/arch/arm/mach-qcom/platsmp.c b/arch/arm/mach-qcom/platsmp.c
new file mode 100644
index 000000000000..9c53ea70550d
--- /dev/null
+++ b/arch/arm/mach-qcom/platsmp.c
@@ -0,0 +1,137 @@
1/*
2 * Copyright (C) 2002 ARM Ltd.
3 * All Rights Reserved
4 * Copyright (c) 2010, Code Aurora Forum. All rights reserved.
5 * Copyright (c) 2014 The Linux Foundation. All rights reserved.
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11
12#include <linux/init.h>
13#include <linux/errno.h>
14#include <linux/delay.h>
15#include <linux/device.h>
16#include <linux/smp.h>
17#include <linux/io.h>
18
19#include <asm/cputype.h>
20#include <asm/smp_plat.h>
21
22#include "scm-boot.h"
23
24#define VDD_SC1_ARRAY_CLAMP_GFS_CTL 0x15A0
25#define SCSS_CPU1CORE_RESET 0xD80
26#define SCSS_DBG_STATUS_CORE_PWRDUP 0xE64
27
28extern void secondary_startup(void);
29
30static DEFINE_SPINLOCK(boot_lock);
31
32#ifdef CONFIG_HOTPLUG_CPU
33static void __ref qcom_cpu_die(unsigned int cpu)
34{
35 wfi();
36}
37#endif
38
39static inline int get_core_count(void)
40{
41 /* 1 + the PART[1:0] field of MIDR */
42 return ((read_cpuid_id() >> 4) & 3) + 1;
43}
44
45static void qcom_secondary_init(unsigned int cpu)
46{
47 /*
48 * Synchronise with the boot thread.
49 */
50 spin_lock(&boot_lock);
51 spin_unlock(&boot_lock);
52}
53
54static void prepare_cold_cpu(unsigned int cpu)
55{
56 int ret;
57 ret = scm_set_boot_addr(virt_to_phys(secondary_startup),
58 SCM_FLAG_COLDBOOT_CPU1);
59 if (ret == 0) {
60 void __iomem *sc1_base_ptr;
61 sc1_base_ptr = ioremap_nocache(0x00902000, SZ_4K*2);
62 if (sc1_base_ptr) {
63 writel(0, sc1_base_ptr + VDD_SC1_ARRAY_CLAMP_GFS_CTL);
64 writel(0, sc1_base_ptr + SCSS_CPU1CORE_RESET);
65 writel(3, sc1_base_ptr + SCSS_DBG_STATUS_CORE_PWRDUP);
66 iounmap(sc1_base_ptr);
67 }
68 } else
69 printk(KERN_DEBUG "Failed to set secondary core boot "
70 "address\n");
71}
72
73static int qcom_boot_secondary(unsigned int cpu, struct task_struct *idle)
74{
75 static int cold_boot_done;
76
77 /* Only need to bring cpu out of reset this way once */
78 if (cold_boot_done == false) {
79 prepare_cold_cpu(cpu);
80 cold_boot_done = true;
81 }
82
83 /*
84 * set synchronisation state between this boot processor
85 * and the secondary one
86 */
87 spin_lock(&boot_lock);
88
89 /*
90 * Send the secondary CPU a soft interrupt, thereby causing
91 * the boot monitor to read the system wide flags register,
92 * and branch to the address found there.
93 */
94 arch_send_wakeup_ipi_mask(cpumask_of(cpu));
95
96 /*
97 * now the secondary core is starting up let it run its
98 * calibrations, then wait for it to finish
99 */
100 spin_unlock(&boot_lock);
101
102 return 0;
103}
104
105/*
106 * Initialise the CPU possible map early - this describes the CPUs
107 * which may be present or become present in the system. The msm8x60
108 * does not support the ARM SCU, so just set the possible cpu mask to
109 * NR_CPUS.
110 */
111static void __init qcom_smp_init_cpus(void)
112{
113 unsigned int i, ncores = get_core_count();
114
115 if (ncores > nr_cpu_ids) {
116 pr_warn("SMP: %u cores greater than maximum (%u), clipping\n",
117 ncores, nr_cpu_ids);
118 ncores = nr_cpu_ids;
119 }
120
121 for (i = 0; i < ncores; i++)
122 set_cpu_possible(i, true);
123}
124
125static void __init qcom_smp_prepare_cpus(unsigned int max_cpus)
126{
127}
128
129struct smp_operations qcom_smp_ops __initdata = {
130 .smp_init_cpus = qcom_smp_init_cpus,
131 .smp_prepare_cpus = qcom_smp_prepare_cpus,
132 .smp_secondary_init = qcom_secondary_init,
133 .smp_boot_secondary = qcom_boot_secondary,
134#ifdef CONFIG_HOTPLUG_CPU
135 .cpu_die = qcom_cpu_die,
136#endif
137};
diff --git a/arch/arm/mach-qcom/scm-boot.c b/arch/arm/mach-qcom/scm-boot.c
new file mode 100644
index 000000000000..45cee3e469a5
--- /dev/null
+++ b/arch/arm/mach-qcom/scm-boot.c
@@ -0,0 +1,39 @@
1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15 * 02110-1301, USA.
16 */
17
18#include <linux/module.h>
19#include <linux/slab.h>
20
21#include "scm.h"
22#include "scm-boot.h"
23
24/*
25 * Set the cold/warm boot address for one of the CPU cores.
26 */
27int scm_set_boot_addr(phys_addr_t addr, int flags)
28{
29 struct {
30 unsigned int flags;
31 phys_addr_t addr;
32 } cmd;
33
34 cmd.addr = addr;
35 cmd.flags = flags;
36 return scm_call(SCM_SVC_BOOT, SCM_BOOT_ADDR,
37 &cmd, sizeof(cmd), NULL, 0);
38}
39EXPORT_SYMBOL(scm_set_boot_addr);
diff --git a/arch/arm/mach-qcom/scm-boot.h b/arch/arm/mach-qcom/scm-boot.h
new file mode 100644
index 000000000000..7be32ff5d687
--- /dev/null
+++ b/arch/arm/mach-qcom/scm-boot.h
@@ -0,0 +1,22 @@
1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12#ifndef __MACH_SCM_BOOT_H
13#define __MACH_SCM_BOOT_H
14
15#define SCM_BOOT_ADDR 0x1
16#define SCM_FLAG_COLDBOOT_CPU1 0x1
17#define SCM_FLAG_WARMBOOT_CPU1 0x2
18#define SCM_FLAG_WARMBOOT_CPU0 0x4
19
20int scm_set_boot_addr(phys_addr_t addr, int flags);
21
22#endif
diff --git a/arch/arm/mach-qcom/scm.c b/arch/arm/mach-qcom/scm.c
new file mode 100644
index 000000000000..c536fd6bf827
--- /dev/null
+++ b/arch/arm/mach-qcom/scm.c
@@ -0,0 +1,299 @@
1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 *
12 * You should have received a copy of the GNU General Public License
13 * along with this program; if not, write to the Free Software
14 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
15 * 02110-1301, USA.
16 */
17
18#include <linux/slab.h>
19#include <linux/io.h>
20#include <linux/module.h>
21#include <linux/mutex.h>
22#include <linux/errno.h>
23#include <linux/err.h>
24
25#include <asm/cacheflush.h>
26
27#include "scm.h"
28
29/* Cache line size for msm8x60 */
30#define CACHELINESIZE 32
31
32#define SCM_ENOMEM -5
33#define SCM_EOPNOTSUPP -4
34#define SCM_EINVAL_ADDR -3
35#define SCM_EINVAL_ARG -2
36#define SCM_ERROR -1
37#define SCM_INTERRUPTED 1
38
39static DEFINE_MUTEX(scm_lock);
40
41/**
42 * struct scm_command - one SCM command buffer
43 * @len: total available memory for command and response
44 * @buf_offset: start of command buffer
45 * @resp_hdr_offset: start of response buffer
46 * @id: command to be executed
47 * @buf: buffer returned from scm_get_command_buffer()
48 *
49 * An SCM command is laid out in memory as follows:
50 *
51 * ------------------- <--- struct scm_command
52 * | command header |
53 * ------------------- <--- scm_get_command_buffer()
54 * | command buffer |
55 * ------------------- <--- struct scm_response and
56 * | response header | scm_command_to_response()
57 * ------------------- <--- scm_get_response_buffer()
58 * | response buffer |
59 * -------------------
60 *
61 * There can be arbitrary padding between the headers and buffers so
62 * you should always use the appropriate scm_get_*_buffer() routines
63 * to access the buffers in a safe manner.
64 */
65struct scm_command {
66 u32 len;
67 u32 buf_offset;
68 u32 resp_hdr_offset;
69 u32 id;
70 u32 buf[0];
71};
72
73/**
74 * struct scm_response - one SCM response buffer
75 * @len: total available memory for response
76 * @buf_offset: start of response data relative to start of scm_response
77 * @is_complete: indicates if the command has finished processing
78 */
79struct scm_response {
80 u32 len;
81 u32 buf_offset;
82 u32 is_complete;
83};
84
85/**
86 * alloc_scm_command() - Allocate an SCM command
87 * @cmd_size: size of the command buffer
88 * @resp_size: size of the response buffer
89 *
90 * Allocate an SCM command, including enough room for the command
91 * and response headers as well as the command and response buffers.
92 *
93 * Returns a valid &scm_command on success or %NULL if the allocation fails.
94 */
95static struct scm_command *alloc_scm_command(size_t cmd_size, size_t resp_size)
96{
97 struct scm_command *cmd;
98 size_t len = sizeof(*cmd) + sizeof(struct scm_response) + cmd_size +
99 resp_size;
100
101 cmd = kzalloc(PAGE_ALIGN(len), GFP_KERNEL);
102 if (cmd) {
103 cmd->len = len;
104 cmd->buf_offset = offsetof(struct scm_command, buf);
105 cmd->resp_hdr_offset = cmd->buf_offset + cmd_size;
106 }
107 return cmd;
108}
109
110/**
111 * free_scm_command() - Free an SCM command
112 * @cmd: command to free
113 *
114 * Free an SCM command.
115 */
116static inline void free_scm_command(struct scm_command *cmd)
117{
118 kfree(cmd);
119}
120
121/**
122 * scm_command_to_response() - Get a pointer to a scm_response
123 * @cmd: command
124 *
125 * Returns a pointer to a response for a command.
126 */
127static inline struct scm_response *scm_command_to_response(
128 const struct scm_command *cmd)
129{
130 return (void *)cmd + cmd->resp_hdr_offset;
131}
132
133/**
134 * scm_get_command_buffer() - Get a pointer to a command buffer
135 * @cmd: command
136 *
137 * Returns a pointer to the command buffer of a command.
138 */
139static inline void *scm_get_command_buffer(const struct scm_command *cmd)
140{
141 return (void *)cmd->buf;
142}
143
144/**
145 * scm_get_response_buffer() - Get a pointer to a response buffer
146 * @rsp: response
147 *
148 * Returns a pointer to a response buffer of a response.
149 */
150static inline void *scm_get_response_buffer(const struct scm_response *rsp)
151{
152 return (void *)rsp + rsp->buf_offset;
153}
154
155static int scm_remap_error(int err)
156{
157 switch (err) {
158 case SCM_ERROR:
159 return -EIO;
160 case SCM_EINVAL_ADDR:
161 case SCM_EINVAL_ARG:
162 return -EINVAL;
163 case SCM_EOPNOTSUPP:
164 return -EOPNOTSUPP;
165 case SCM_ENOMEM:
166 return -ENOMEM;
167 }
168 return -EINVAL;
169}
170
171static u32 smc(u32 cmd_addr)
172{
173 int context_id;
174 register u32 r0 asm("r0") = 1;
175 register u32 r1 asm("r1") = (u32)&context_id;
176 register u32 r2 asm("r2") = cmd_addr;
177 do {
178 asm volatile(
179 __asmeq("%0", "r0")
180 __asmeq("%1", "r0")
181 __asmeq("%2", "r1")
182 __asmeq("%3", "r2")
183#ifdef REQUIRES_SEC
184 ".arch_extension sec\n"
185#endif
186 "smc #0 @ switch to secure world\n"
187 : "=r" (r0)
188 : "r" (r0), "r" (r1), "r" (r2)
189 : "r3");
190 } while (r0 == SCM_INTERRUPTED);
191
192 return r0;
193}
194
195static int __scm_call(const struct scm_command *cmd)
196{
197 int ret;
198 u32 cmd_addr = virt_to_phys(cmd);
199
200 /*
201 * Flush the entire cache here so callers don't have to remember
202 * to flush the cache when passing physical addresses to the secure
203 * side in the buffer.
204 */
205 flush_cache_all();
206 ret = smc(cmd_addr);
207 if (ret < 0)
208 ret = scm_remap_error(ret);
209
210 return ret;
211}
212
213/**
214 * scm_call() - Send an SCM command
215 * @svc_id: service identifier
216 * @cmd_id: command identifier
217 * @cmd_buf: command buffer
218 * @cmd_len: length of the command buffer
219 * @resp_buf: response buffer
220 * @resp_len: length of the response buffer
221 *
222 * Sends a command to the SCM and waits for the command to finish processing.
223 */
224int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, size_t cmd_len,
225 void *resp_buf, size_t resp_len)
226{
227 int ret;
228 struct scm_command *cmd;
229 struct scm_response *rsp;
230
231 cmd = alloc_scm_command(cmd_len, resp_len);
232 if (!cmd)
233 return -ENOMEM;
234
235 cmd->id = (svc_id << 10) | cmd_id;
236 if (cmd_buf)
237 memcpy(scm_get_command_buffer(cmd), cmd_buf, cmd_len);
238
239 mutex_lock(&scm_lock);
240 ret = __scm_call(cmd);
241 mutex_unlock(&scm_lock);
242 if (ret)
243 goto out;
244
245 rsp = scm_command_to_response(cmd);
246 do {
247 u32 start = (u32)rsp;
248 u32 end = (u32)scm_get_response_buffer(rsp) + resp_len;
249 start &= ~(CACHELINESIZE - 1);
250 while (start < end) {
251 asm ("mcr p15, 0, %0, c7, c6, 1" : : "r" (start)
252 : "memory");
253 start += CACHELINESIZE;
254 }
255 } while (!rsp->is_complete);
256
257 if (resp_buf)
258 memcpy(resp_buf, scm_get_response_buffer(rsp), resp_len);
259out:
260 free_scm_command(cmd);
261 return ret;
262}
263EXPORT_SYMBOL(scm_call);
264
265u32 scm_get_version(void)
266{
267 int context_id;
268 static u32 version = -1;
269 register u32 r0 asm("r0");
270 register u32 r1 asm("r1");
271
272 if (version != -1)
273 return version;
274
275 mutex_lock(&scm_lock);
276
277 r0 = 0x1 << 8;
278 r1 = (u32)&context_id;
279 do {
280 asm volatile(
281 __asmeq("%0", "r0")
282 __asmeq("%1", "r1")
283 __asmeq("%2", "r0")
284 __asmeq("%3", "r1")
285#ifdef REQUIRES_SEC
286 ".arch_extension sec\n"
287#endif
288 "smc #0 @ switch to secure world\n"
289 : "=r" (r0), "=r" (r1)
290 : "r" (r0), "r" (r1)
291 : "r2", "r3");
292 } while (r0 == SCM_INTERRUPTED);
293
294 version = r1;
295 mutex_unlock(&scm_lock);
296
297 return version;
298}
299EXPORT_SYMBOL(scm_get_version);
diff --git a/arch/arm/mach-qcom/scm.h b/arch/arm/mach-qcom/scm.h
new file mode 100644
index 000000000000..00b31ea58f29
--- /dev/null
+++ b/arch/arm/mach-qcom/scm.h
@@ -0,0 +1,25 @@
1/* Copyright (c) 2010, Code Aurora Forum. All rights reserved.
2 *
3 * This program is free software; you can redistribute it and/or modify
4 * it under the terms of the GNU General Public License version 2 and
5 * only version 2 as published by the Free Software Foundation.
6 *
7 * This program is distributed in the hope that it will be useful,
8 * but WITHOUT ANY WARRANTY; without even the implied warranty of
9 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
10 * GNU General Public License for more details.
11 */
12#ifndef __MACH_SCM_H
13#define __MACH_SCM_H
14
15#define SCM_SVC_BOOT 0x1
16#define SCM_SVC_PIL 0x2
17
18extern int scm_call(u32 svc_id, u32 cmd_id, const void *cmd_buf, size_t cmd_len,
19 void *resp_buf, size_t resp_len);
20
21#define SCM_VERSION(major, minor) (((major) << 16) | ((minor) & 0xFF))
22
23extern u32 scm_get_version(void);
24
25#endif
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-28 13:35:43 -0500