Commit e8a9293295a1a54f6e43970bed2d3bfd124be02c
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ee9bc77f3a
Exists in
v2017.01-smarct4x
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ARM: uniphier: add PSCI support for UniPhier ARMv7 SoCs
Currently, only the CPU_ON function is supported. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Showing 8 changed files with 275 additions and 3 deletions Side-by-side Diff
arch/arm/mach-uniphier/Kconfig
arch/arm/mach-uniphier/arm32/Makefile
arch/arm/mach-uniphier/arm32/arm-mpcore.h
arch/arm/mach-uniphier/arm32/psci.c
1 | +/* | |
2 | + * Copyright (C) 2016 Socionext Inc. | |
3 | + * Author: Masahiro Yamada <yamada.masahiro@socionext.com> | |
4 | + * | |
5 | + * SPDX-License-Identifier: GPL-2.0+ | |
6 | + */ | |
7 | + | |
8 | +#include <common.h> | |
9 | +#include <linux/bitops.h> | |
10 | +#include <linux/io.h> | |
11 | +#include <linux/kernel.h> | |
12 | +#include <linux/psci.h> | |
13 | +#include <linux/sizes.h> | |
14 | +#include <asm/processor.h> | |
15 | +#include <asm/psci.h> | |
16 | +#include <asm/secure.h> | |
17 | + | |
18 | +#include "../debug.h" | |
19 | +#include "../soc-info.h" | |
20 | +#include "arm-mpcore.h" | |
21 | +#include "cache-uniphier.h" | |
22 | + | |
23 | +#define UNIPHIER_SMPCTRL_ROM_RSV2 0x59801208 | |
24 | + | |
25 | +void uniphier_smp_trampoline(void); | |
26 | +void uniphier_smp_trampoline_end(void); | |
27 | +u32 uniphier_smp_booted[CONFIG_ARMV7_PSCI_NR_CPUS]; | |
28 | + | |
29 | +static int uniphier_get_nr_cpus(void) | |
30 | +{ | |
31 | + switch (uniphier_get_soc_type()) { | |
32 | + case SOC_UNIPHIER_SLD3: | |
33 | + case SOC_UNIPHIER_PRO4: | |
34 | + case SOC_UNIPHIER_PRO5: | |
35 | + return 2; | |
36 | + case SOC_UNIPHIER_PXS2: | |
37 | + case SOC_UNIPHIER_LD6B: | |
38 | + return 4; | |
39 | + default: | |
40 | + return 1; | |
41 | + } | |
42 | +} | |
43 | + | |
44 | +static void uniphier_smp_kick_all_cpus(void) | |
45 | +{ | |
46 | + const u32 target_ways = BIT(0); | |
47 | + size_t trmp_size; | |
48 | + u32 trmp_src = (unsigned long)uniphier_smp_trampoline; | |
49 | + u32 trmp_src_end = (unsigned long)uniphier_smp_trampoline_end; | |
50 | + u32 trmp_dest, trmp_dest_end; | |
51 | + int nr_cpus, i; | |
52 | + int timeout = 1000; | |
53 | + | |
54 | + nr_cpus = uniphier_get_nr_cpus(); | |
55 | + if (nr_cpus == 1) | |
56 | + return; | |
57 | + | |
58 | + for (i = 0; i < nr_cpus; i++) /* lock ways for all CPUs */ | |
59 | + uniphier_cache_set_active_ways(i, 0); | |
60 | + uniphier_cache_inv_way(target_ways); | |
61 | + uniphier_cache_enable(); | |
62 | + | |
63 | + /* copy trampoline code */ | |
64 | + uniphier_cache_prefetch_range(trmp_src, trmp_src_end, target_ways); | |
65 | + | |
66 | + trmp_size = trmp_src_end - trmp_src; | |
67 | + | |
68 | + trmp_dest = trmp_src & (SZ_64K - 1); | |
69 | + trmp_dest += SZ_1M - SZ_64K * 2; | |
70 | + | |
71 | + trmp_dest_end = trmp_dest + trmp_size; | |
72 | + | |
73 | + uniphier_cache_touch_range(trmp_dest, trmp_dest_end, target_ways); | |
74 | + | |
75 | + writel(trmp_dest, UNIPHIER_SMPCTRL_ROM_RSV2); | |
76 | + | |
77 | + asm("dsb ishst\n" /* Ensure the write to ROM_RSV2 is visible */ | |
78 | + "sev"); /* Bring up all secondary CPUs from Boot ROM into U-Boot */ | |
79 | + | |
80 | + while (--timeout) { | |
81 | + int all_booted = 1; | |
82 | + | |
83 | + for (i = 1; i < nr_cpus; i++) | |
84 | + if (!uniphier_smp_booted[i]) | |
85 | + all_booted = 0; | |
86 | + if (all_booted) | |
87 | + break; | |
88 | + udelay(1); | |
89 | + | |
90 | + /* barrier here because uniphier_smp_booted[] may be updated */ | |
91 | + cpu_relax(); | |
92 | + } | |
93 | + | |
94 | + if (!timeout) | |
95 | + printf("warning: some of secondary CPUs may not boot\n"); | |
96 | + | |
97 | + uniphier_cache_disable(); | |
98 | +} | |
99 | + | |
100 | +void psci_board_init(void) | |
101 | +{ | |
102 | + unsigned long scu_base; | |
103 | + u32 scu_ctrl, tmp; | |
104 | + | |
105 | + asm("mrc p15, 4, %0, c15, c0, 0" : "=r" (scu_base)); | |
106 | + | |
107 | + scu_ctrl = readl(scu_base + 0x30); | |
108 | + if (!(scu_ctrl & 1)) | |
109 | + writel(scu_ctrl | 0x1, scu_base + 0x30); | |
110 | + | |
111 | + scu_ctrl = readl(scu_base + SCU_CTRL); | |
112 | + scu_ctrl |= SCU_ENABLE | SCU_STANDBY_ENABLE; | |
113 | + writel(scu_ctrl, scu_base + SCU_CTRL); | |
114 | + | |
115 | + tmp = readl(scu_base + SCU_SNSAC); | |
116 | + tmp |= 0xfff; | |
117 | + writel(tmp, scu_base + SCU_SNSAC); | |
118 | + | |
119 | + uniphier_smp_kick_all_cpus(); | |
120 | +} | |
121 | + | |
122 | +void psci_arch_init(void) | |
123 | +{ | |
124 | + u32 actlr; | |
125 | + | |
126 | + asm("mrc p15, 0, %0, c1, c0, 1" : "=r" (actlr)); | |
127 | + actlr |= 0x41; /* set SMP and FW bits */ | |
128 | + asm("mcr p15, 0, %0, c1, c0, 1" : : "r" (actlr)); | |
129 | +} | |
130 | + | |
131 | +u32 uniphier_psci_holding_pen_release __secure_data = 0xffffffff; | |
132 | + | |
133 | +int __secure psci_cpu_on(u32 function_id, u32 cpuid, u32 entry_point) | |
134 | +{ | |
135 | + u32 cpu = cpuid & 0xff; | |
136 | + | |
137 | + debug_puts("[U-Boot PSCI] psci_cpu_on: cpuid="); | |
138 | + debug_puth(cpuid); | |
139 | + debug_puts(", entry_point="); | |
140 | + debug_puth(entry_point); | |
141 | + debug_puts("\n"); | |
142 | + | |
143 | + psci_save_target_pc(cpu, entry_point); | |
144 | + | |
145 | + /* We assume D-cache is off, so do not call flush_dcache() here */ | |
146 | + uniphier_psci_holding_pen_release = cpu; | |
147 | + | |
148 | + /* Send an event to wake up the secondary CPU. */ | |
149 | + asm("dsb ishst\n" | |
150 | + "sev"); | |
151 | + | |
152 | + return PSCI_RET_SUCCESS; | |
153 | +} |
arch/arm/mach-uniphier/arm32/psci_smp.S
1 | +/* | |
2 | + * Copyright (C) 2016 Socionext Inc. | |
3 | + * Author: Masahiro Yamada <yamada.masahiro@socionext.com> | |
4 | + * | |
5 | + * SPDX-License-Identifier: GPL-2.0+ | |
6 | + */ | |
7 | + | |
8 | +#include <linux/linkage.h> | |
9 | +#include <asm/system.h> | |
10 | + | |
11 | + .section ._secure.text, "ax" | |
12 | + | |
13 | +ENTRY(uniphier_smp_trampoline) | |
14 | + ldr r0, 0f | |
15 | + mrc p15, 0, r1, c1, c0, 0 @ SCTLR (System Control Register) | |
16 | + orr r1, r1, #CR_I @ Enable ICache | |
17 | + bic r1, r1, #(CR_C | CR_M) @ Disable MMU and Dcache | |
18 | + mcr p15, 0, r1, c1, c0, 0 | |
19 | + | |
20 | + bx r0 | |
21 | +0: .word uniphier_secondary_startup | |
22 | + .globl uniphier_smp_trampoline_end | |
23 | +uniphier_smp_trampoline_end: | |
24 | +ENDPROC(uniphier_smp_trampoline) | |
25 | + | |
26 | +LENTRY(uniphier_secondary_startup) | |
27 | + mrc p15, 0, r1, c0, c0, 5 @ MPIDR (Multiprocessor Affinity Reg) | |
28 | + and r1, r1, #0xff | |
29 | + | |
30 | + ldr r2, =uniphier_smp_booted | |
31 | + mov r0, #1 | |
32 | + str r0, [r2, r1, lsl #2] | |
33 | + | |
34 | + ldr r2, =uniphier_psci_holding_pen_release | |
35 | +pen: ldr r0, [r2] | |
36 | + cmp r0, r1 | |
37 | + beq psci_cpu_entry | |
38 | + wfe | |
39 | + b pen | |
40 | +ENDPROC(uniphier_secondary_startup) |
arch/arm/mach-uniphier/debug.h
1 | +/* | |
2 | + * Copyright (C) 2016 Socionext Inc. | |
3 | + * Author: Masahiro Yamada <yamada.masahiro@socionext.com> | |
4 | + * | |
5 | + * SPDX-License-Identifier: GPL-2.0+ | |
6 | + */ | |
7 | + | |
8 | +#ifndef __DEBUG_H__ | |
9 | +#define __DEBUG_H__ | |
10 | + | |
11 | +#include <linux/io.h> | |
12 | +#include <linux/serial_reg.h> | |
13 | + | |
14 | +#define DEBUG_UART_BASE 0x54006800 | |
15 | +#define UART_SHIFT 2 | |
16 | + | |
17 | +#define UNIPHIER_UART_TX 0 | |
18 | +#define UNIPHIER_UART_LSR (5 * 4) | |
19 | + | |
20 | +/* All functions are inline so that they can be called from .secure section. */ | |
21 | + | |
22 | +#ifdef DEBUG | |
23 | +static inline void debug_putc(int c) | |
24 | +{ | |
25 | + void __iomem *base = (void __iomem *)DEBUG_UART_BASE; | |
26 | + | |
27 | + while (!(readl(base + UNIPHIER_UART_LSR) & UART_LSR_THRE)) | |
28 | + ; | |
29 | + | |
30 | + writel(c, base + UNIPHIER_UART_TX); | |
31 | +} | |
32 | + | |
33 | +static inline void debug_puts(const char *s) | |
34 | +{ | |
35 | + while (*s) { | |
36 | + if (*s == '\n') | |
37 | + debug_putc('\r'); | |
38 | + | |
39 | + debug_putc(*s++); | |
40 | + } | |
41 | +} | |
42 | + | |
43 | +static inline void debug_puth(unsigned long val) | |
44 | +{ | |
45 | + int i; | |
46 | + unsigned char c; | |
47 | + | |
48 | + for (i = 8; i--; ) { | |
49 | + c = ((val >> (i * 4)) & 0xf); | |
50 | + c += (c >= 10) ? 'a' - 10 : '0'; | |
51 | + debug_putc(c); | |
52 | + } | |
53 | +} | |
54 | +#else | |
55 | +static inline void debug_putc(int c) | |
56 | +{ | |
57 | +} | |
58 | + | |
59 | +static inline void debug_puts(const char *s) | |
60 | +{ | |
61 | +} | |
62 | + | |
63 | +static inline void debug_puth(unsigned long val) | |
64 | +{ | |
65 | +} | |
66 | +#endif | |
67 | + | |
68 | +#endif /* __DEBUG_H__ */ |
arch/arm/mach-uniphier/sbc/sbc-regs.h
1 | 1 | /* |
2 | 2 | * UniPhier SBC (System Bus Controller) registers |
3 | 3 | * |
4 | - * Copyright (C) 2011-2015 Masahiro Yamada <yamada.masahiro@socionext.com> | |
4 | + * Copyright (C) 2011-2014 Panasonic Corporation | |
5 | + * Copyright (C) 2015-2016 Socionext Inc. | |
5 | 6 | * |
6 | 7 | * SPDX-License-Identifier: GPL-2.0+ |
7 | 8 | */ |
... | ... | @@ -75,7 +76,6 @@ |
75 | 76 | #define SBCTRL74 (SBCTRL_BASE + 0x170) |
76 | 77 | |
77 | 78 | #define PC0CTRL 0x598000c0 |
78 | -#define ROM_BOOT_ROMRSV2 0x59801208 | |
79 | 79 | |
80 | 80 | #ifndef __ASSEMBLY__ |
81 | 81 | #include <linux/io.h> |
include/configs/uniphier.h
1 | 1 | /* |
2 | - * Copyright (C) 2012-2015 Masahiro Yamada <yamada.masahiro@socionext.com> | |
2 | + * Copyright (C) 2012-2015 Panasonic Corporation | |
3 | + * Copyright (C) 2015-2016 Socionext Inc. | |
4 | + * Author: Masahiro Yamada <yamada.masahiro@socionext.com> | |
3 | 5 | * |
4 | 6 | * SPDX-License-Identifier: GPL-2.0+ |
5 | 7 | */ |
... | ... | @@ -8,6 +10,9 @@ |
8 | 10 | |
9 | 11 | #ifndef __CONFIG_UNIPHIER_COMMON_H__ |
10 | 12 | #define __CONFIG_UNIPHIER_COMMON_H__ |
13 | + | |
14 | +#define CONFIG_ARMV7_PSCI | |
15 | +#define CONFIG_ARMV7_PSCI_NR_CPUS 4 | |
11 | 16 | |
12 | 17 | #define CONFIG_SYS_EEPROM_PAGE_WRITE_DELAY_MS 10 |
13 | 18 |