diff options
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/armv8/zynqmp/cpu.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/arm/cpu/armv8/zynqmp/cpu.c b/arch/arm/cpu/armv8/zynqmp/cpu.c index 280e07ad36..f7ed179c18 100644 --- a/arch/arm/cpu/armv8/zynqmp/cpu.c +++ b/arch/arm/cpu/armv8/zynqmp/cpu.c @@ -98,3 +98,76 @@ unsigned int zynqmp_get_silicon_version(void) return ZYNQMP_CSU_VERSION_SILICON; } + +#define ZYNQMP_MMIO_READ 0xC2000014 +#define ZYNQMP_MMIO_WRITE 0xC2000013 + +#ifndef CONFIG_SPL_BUILD +int invoke_smc(u32 pm_api_id, u32 arg0, u32 arg1, u32 arg2, u32 arg3, + u32 *ret_payload) +{ + /* + * Added SIP service call Function Identifier + * Make sure to stay in x0 register + */ + struct pt_regs regs; + + regs.regs[0] = pm_api_id; + regs.regs[1] = ((u64)arg1 << 32) | arg0; + regs.regs[2] = ((u64)arg3 << 32) | arg2; + + smc_call(®s); + + if (ret_payload != NULL) { + ret_payload[0] = (u32)regs.regs[0]; + ret_payload[1] = upper_32_bits(regs.regs[0]); + ret_payload[2] = (u32)regs.regs[1]; + ret_payload[3] = upper_32_bits(regs.regs[1]); + ret_payload[4] = (u32)regs.regs[2]; + } + + return regs.regs[0]; +} + +int zynqmp_mmio_write(const u32 address, + const u32 mask, + const u32 value) +{ + return invoke_smc(ZYNQMP_MMIO_WRITE, address, mask, value, 0, NULL); +} + +int zynqmp_mmio_read(const u32 address, u32 *value) +{ + u32 ret_payload[PAYLOAD_ARG_CNT]; + u32 ret; + + if (!value) + return -EINVAL; + + ret = invoke_smc(ZYNQMP_MMIO_READ, address, 0, 0, 0, ret_payload); + *value = ret_payload[1]; + + return ret; +} +#else +int zynqmp_mmio_write(const u32 address, + const u32 mask, + const u32 value) +{ + u32 data; + u32 value_local = value; + + zynqmp_mmio_read(address, &data); + data &= ~mask; + value_local &= mask; + value_local |= data; + writel(value_local, (ulong)address); + return 0; +} + +int zynqmp_mmio_read(const u32 address, u32 *value) +{ + *value = readl((ulong)address); + return 0; +} +#endif |