diff options
Diffstat (limited to 'arch/arm/cpu/armv8')
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/mp.c | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/arch/arm/cpu/armv8/zynqmp/mp.c b/arch/arm/cpu/armv8/zynqmp/mp.c index dcb80b522e..58312a79bc 100644 --- a/arch/arm/cpu/armv8/zynqmp/mp.c +++ b/arch/arm/cpu/armv8/zynqmp/mp.c @@ -183,6 +183,29 @@ static void set_r5_start(u8 high) writel(tmp, &rpu_base->rpu1_cfg); } +static void write_tcm_boot_trampoline(u32 boot_addr) +{ + if (boot_addr) { + /* + * Boot trampoline is simple ASM code below. + * + * b over; + * label: + * .word 0 + * over: ldr r0, =label + * ldr r1, [r0] + * bx r1 + */ + debug("Write boot trampoline for %x\n", boot_addr); + writel(0xea000000, ZYNQMP_TCM_START_ADDRESS); + writel(boot_addr, ZYNQMP_TCM_START_ADDRESS + 0x4); + writel(0xe59f0004, ZYNQMP_TCM_START_ADDRESS + 0x8); + writel(0xe5901000, ZYNQMP_TCM_START_ADDRESS + 0xc); + writel(0xe12fff11, ZYNQMP_TCM_START_ADDRESS + 0x10); + writel(0x00000004, ZYNQMP_TCM_START_ADDRESS + 0x14); // address for + } +} + int cpu_release(int nr, int argc, char * const argv[]) { if (nr >= ZYNQMP_CORE_APU0 && nr <= ZYNQMP_CORE_APU3) { @@ -205,11 +228,18 @@ int cpu_release(int nr, int argc, char * const argv[]) } u32 boot_addr = simple_strtoul(argv[0], NULL, 16); + u32 boot_addr_uniq = 0; if (!(boot_addr == ZYNQMP_R5_LOVEC_ADDR || boot_addr == ZYNQMP_R5_HIVEC_ADDR)) { - printf("Invalid starting address 0x%x\n", boot_addr); - printf("0 or 0xffff0000 are permitted\n"); - return 1; + printf("Using TCM jump trampoline for address 0x%x\n", + boot_addr); + /* Save boot address for later usage */ + boot_addr_uniq = boot_addr; + /* + * R5 needs to start from LOVEC at TCM + * OCM will be probably occupied by ATF + */ + boot_addr = ZYNQMP_R5_LOVEC_ADDR; } if (!strncmp(argv[1], "lockstep", 8)) { @@ -219,6 +249,7 @@ int cpu_release(int nr, int argc, char * const argv[]) set_r5_start(boot_addr); enable_clock_r5(); release_r5_reset(LOCK); + write_tcm_boot_trampoline(boot_addr_uniq); set_r5_halt_mode(RELEASE, LOCK); } else if (!strncmp(argv[1], "split", 5)) { printf("R5 split mode\n"); @@ -226,6 +257,7 @@ int cpu_release(int nr, int argc, char * const argv[]) set_r5_halt_mode(HALT, SPLIT); enable_clock_r5(); release_r5_reset(SPLIT); + write_tcm_boot_trampoline(boot_addr_uniq); set_r5_halt_mode(RELEASE, SPLIT); } else { printf("Unsupported mode\n"); |