arch/arm/cpu/armv8/zynqmp/mp.c

   1 /*
   2  * (C) Copyright 2014 - 2015 Xilinx, Inc.
   3  * Michal Simek <michal.simek@xilinx.com>
   4  *
   5  * SPDX-License-Identifier:     GPL-2.0+
   6  */
   7
   8 #include <common.h>
   9 #include <asm/arch/hardware.h>
  10 #include <asm/arch/sys_proto.h>
  11 #include <asm/io.h>
  12
  13 #define LOCK            0
  14 #define SPLIT           1
  15
  16 #define HALT            0
  17 #define RELEASE         1
  18
  19 #define ZYNQMP_BOOTADDR_HIGH_MASK               0xFFFFFFFF
  20 #define ZYNQMP_R5_HIVEC_ADDR                    0xFFFF0000
  21 #define ZYNQMP_R5_LOVEC_ADDR                    0x0
  22 #define ZYNQMP_RPU_CFG_CPU_HALT_MASK            0x01
  23 #define ZYNQMP_RPU_CFG_HIVEC_MASK               0x04
  24 #define ZYNQMP_RPU_GLBL_CTRL_SPLIT_LOCK_MASK    0x08
  25 #define ZYNQMP_RPU_GLBL_CTRL_TCM_COMB_MASK      0x40
  26 #define ZYNQMP_RPU_GLBL_CTRL_SLCLAMP_MASK       0x10
  27
  28 #define ZYNQMP_CRLAPB_RST_LPD_AMBA_RST_MASK     0x04
  29 #define ZYNQMP_CRLAPB_RST_LPD_R50_RST_MASK      0x01
  30 #define ZYNQMP_CRLAPB_RST_LPD_R51_RST_MASK      0x02
  31 #define ZYNQMP_CRLAPB_CPU_R5_CTRL_CLKACT_MASK   0x1000000
  32
  33 #define ZYNQMP_TCM_START_ADDRESS                0xFFE00000
  34 #define ZYNQMP_TCM_BOTH_SIZE                    0x40000
  35
  36 #define ZYNQMP_CORE_APU0        0
  37 #define ZYNQMP_CORE_APU3        3
  38
  39 #define ZYNQMP_MAX_CORES        6
  40
  41 int is_core_valid(unsigned int core)
  42 {
  43         if (core < ZYNQMP_MAX_CORES)
  44                 return 1;
  45
  46         return 0;
  47 }
  48
  49 int cpu_reset(int nr)
  50 {
  51         puts("Feature is not implemented.\n");
  52         return 0;
  53 }
  54
  55 static void set_r5_halt_mode(u8 halt, u8 mode)
  56 {
  57         u32 tmp;
  58
  59         tmp = readl(&rpu_base->rpu0_cfg);
  60         if (halt == HALT)
  61                 tmp &= ~ZYNQMP_RPU_CFG_CPU_HALT_MASK;
  62         else
  63                 tmp |= ZYNQMP_RPU_CFG_CPU_HALT_MASK;
  64         writel(tmp, &rpu_base->rpu0_cfg);
  65
  66         if (mode == LOCK) {
  67                 tmp = readl(&rpu_base->rpu1_cfg);
  68                 if (halt == HALT)
  69                         tmp &= ~ZYNQMP_RPU_CFG_CPU_HALT_MASK;
  70                 else
  71                         tmp |= ZYNQMP_RPU_CFG_CPU_HALT_MASK;
  72                 writel(tmp, &rpu_base->rpu1_cfg);
  73         }
  74 }
  75
  76 static void set_r5_tcm_mode(u8 mode)
  77 {
  78         u32 tmp;
  79
  80         tmp = readl(&rpu_base->rpu_glbl_ctrl);
  81         if (mode == LOCK) {
  82                 tmp &= ~ZYNQMP_RPU_GLBL_CTRL_SPLIT_LOCK_MASK;
  83                 tmp |= ZYNQMP_RPU_GLBL_CTRL_TCM_COMB_MASK |
  84                        ZYNQMP_RPU_GLBL_CTRL_SLCLAMP_MASK;
  85         } else {
  86                 tmp |= ZYNQMP_RPU_GLBL_CTRL_SPLIT_LOCK_MASK;
  87                 tmp &= ~(ZYNQMP_RPU_GLBL_CTRL_TCM_COMB_MASK |
  88                        ZYNQMP_RPU_GLBL_CTRL_SLCLAMP_MASK);
  89         }
  90
  91         writel(tmp, &rpu_base->rpu_glbl_ctrl);
  92 }
  93
  94 static void set_r5_reset(u8 mode)
  95 {
  96         u32 tmp;
  97
  98         tmp = readl(&crlapb_base->rst_lpd_top);
  99         tmp |= (ZYNQMP_CRLAPB_RST_LPD_AMBA_RST_MASK |
 100                ZYNQMP_CRLAPB_RST_LPD_R50_RST_MASK);
 101
 102         if (mode == LOCK)
 103                 tmp |= ZYNQMP_CRLAPB_RST_LPD_R51_RST_MASK;
 104
 105         writel(tmp, &crlapb_base->rst_lpd_top);
 106 }
 107
 108 static void release_r5_reset(u8 mode)
 109 {
 110         u32 tmp;
 111
 112         tmp = readl(&crlapb_base->rst_lpd_top);
 113         tmp &= ~(ZYNQMP_CRLAPB_RST_LPD_AMBA_RST_MASK |
 114                ZYNQMP_CRLAPB_RST_LPD_R50_RST_MASK);
 115
 116         if (mode == LOCK)
 117                 tmp &= ~ZYNQMP_CRLAPB_RST_LPD_R51_RST_MASK;
 118
 119         writel(tmp, &crlapb_base->rst_lpd_top);
 120 }
 121
 122 static void enable_clock_r5(void)
 123 {
 124         u32 tmp;
 125
 126         tmp = readl(&crlapb_base->cpu_r5_ctrl);
 127         tmp |= ZYNQMP_CRLAPB_CPU_R5_CTRL_CLKACT_MASK;
 128         writel(tmp, &crlapb_base->cpu_r5_ctrl);
 129
 130         /* Give some delay for clock
 131          * to propogate */
 132         udelay(0x500);
 133 }
 134
 135 int cpu_disable(int nr)
 136 {
 137         if (nr >= ZYNQMP_CORE_APU0 && nr <= ZYNQMP_CORE_APU3) {
 138                 u32 val = readl(&crfapb_base->rst_fpd_apu);
 139                 val |= 1 << nr;
 140                 writel(val, &crfapb_base->rst_fpd_apu);
 141         } else {
 142                 set_r5_reset(LOCK);
 143         }
 144
 145         return 0;
 146 }
 147
 148 int cpu_status(int nr)
 149 {
 150         if (nr >= ZYNQMP_CORE_APU0 && nr <= ZYNQMP_CORE_APU3) {
 151                 u32 addr_low = readl(((u8 *)&apu_base->rvbar_addr0_l) + nr * 8);
 152                 u32 addr_high = readl(((u8 *)&apu_base->rvbar_addr0_h) +
 153                                       nr * 8);
 154                 u32 val = readl(&crfapb_base->rst_fpd_apu);
 155                 val &= 1 << nr;
 156                 printf("APU CPU%d %s - starting address HI: %x, LOW: %x\n",
 157                        nr, val ? "OFF" : "ON" , addr_high, addr_low);
 158         } else {
 159                 u32 val = readl(&crlapb_base->rst_lpd_top);
 160                 val &= 1 << (nr - 4);
 161                 printf("RPU CPU%d %s\n", nr - 4, val ? "OFF" : "ON");
 162         }
 163
 164         return 0;
 165 }
 166
 167 static void set_r5_start(u8 high)
 168 {
 169         u32 tmp;
 170
 171         tmp = readl(&rpu_base->rpu0_cfg);
 172         if (high)
 173                 tmp |= ZYNQMP_RPU_CFG_HIVEC_MASK;
 174         else
 175                 tmp &= ~ZYNQMP_RPU_CFG_HIVEC_MASK;
 176         writel(tmp, &rpu_base->rpu0_cfg);
 177
 178         tmp = readl(&rpu_base->rpu1_cfg);
 179         if (high)
 180                 tmp |= ZYNQMP_RPU_CFG_HIVEC_MASK;
 181         else
 182                 tmp &= ~ZYNQMP_RPU_CFG_HIVEC_MASK;
 183         writel(tmp, &rpu_base->rpu1_cfg);
 184 }
 185
 186 static void write_tcm_boot_trampoline(u32 boot_addr)
 187 {
 188         if (boot_addr) {
 189                 /*
 190                  * Boot trampoline is simple ASM code below.
 191                  *
 192                  *              b over;
 193                  *      label:
 194                  *      .word   0
 195                  *      over:   ldr     r0, =label
 196                  *              ldr     r1, [r0]
 197                  *              bx      r1
 198                  */
 199                 debug("Write boot trampoline for %x\n", boot_addr);
 200                 writel(0xea000000, ZYNQMP_TCM_START_ADDRESS);
 201                 writel(boot_addr, ZYNQMP_TCM_START_ADDRESS + 0x4);
 202                 writel(0xe59f0004, ZYNQMP_TCM_START_ADDRESS + 0x8);
 203                 writel(0xe5901000, ZYNQMP_TCM_START_ADDRESS + 0xc);
 204                 writel(0xe12fff11, ZYNQMP_TCM_START_ADDRESS + 0x10);
 205                 writel(0x00000004, ZYNQMP_TCM_START_ADDRESS + 0x14); // address for
 206         }
 207 }
 208
 209 int cpu_release(int nr, int argc, char * const argv[])
 210 {
 211         if (nr >= ZYNQMP_CORE_APU0 && nr <= ZYNQMP_CORE_APU3) {
 212                 u64 boot_addr = simple_strtoull(argv[0], NULL, 16);
 213                 /* HIGH */
 214                 writel((u32)(boot_addr >> 32),
 215                        ((u8 *)&apu_base->rvbar_addr0_h) + nr * 8);
 216                 /* LOW */
 217                 writel((u32)(boot_addr & ZYNQMP_BOOTADDR_HIGH_MASK),
 218                        ((u8 *)&apu_base->rvbar_addr0_l) + nr * 8);
 219
 220                 u32 val = readl(&crfapb_base->rst_fpd_apu);
 221                 val &= ~(1 << nr);
 222                 writel(val, &crfapb_base->rst_fpd_apu);
 223         } else {
 224                 if (argc != 2) {
 225                         printf("Invalid number of arguments to release.\n");
 226                         printf("<addr> <mode>-Start addr lockstep or split\n");
 227                         return 1;
 228                 }
 229
 230                 u32 boot_addr = simple_strtoul(argv[0], NULL, 16);
 231                 u32 boot_addr_uniq = 0;
 232                 if (!(boot_addr == ZYNQMP_R5_LOVEC_ADDR ||
 233                       boot_addr == ZYNQMP_R5_HIVEC_ADDR)) {
 234                         printf("Using TCM jump trampoline for address 0x%x\n",
 235                                boot_addr);
 236                         /* Save boot address for later usage */
 237                         boot_addr_uniq = boot_addr;
 238                         /*
 239                          * R5 needs to start from LOVEC at TCM
 240                          * OCM will be probably occupied by ATF
 241                          */
 242                         boot_addr = ZYNQMP_R5_LOVEC_ADDR;
 243                 }
 244
 245                 if (!strncmp(argv[1], "lockstep", 8)) {
 246                         printf("R5 lockstep mode\n");
 247                         set_r5_tcm_mode(LOCK);
 248                         set_r5_halt_mode(HALT, LOCK);
 249                         set_r5_start(boot_addr);
 250                         enable_clock_r5();
 251                         release_r5_reset(LOCK);
 252                         write_tcm_boot_trampoline(boot_addr_uniq);
 253                         set_r5_halt_mode(RELEASE, LOCK);
 254                 } else if (!strncmp(argv[1], "split", 5)) {
 255                         printf("R5 split mode\n");
 256                         set_r5_tcm_mode(SPLIT);
 257                         set_r5_halt_mode(HALT, SPLIT);
 258                         enable_clock_r5();
 259                         release_r5_reset(SPLIT);
 260                         write_tcm_boot_trampoline(boot_addr_uniq);
 261                         set_r5_halt_mode(RELEASE, SPLIT);
 262                 } else {
 263                         printf("Unsupported mode\n");
 264                         return 1;
 265                 }
 266         }
 267
 268         return 0;
 269 }