From d9efdc7d424ddfdc2aafeee4268435f9f46dd1db Mon Sep 17 00:00:00 2001 From: Lukas Funke Date: Fri, 28 Oct 2022 14:15:47 +0200 Subject: [PATCH] arm64: zynqmp: dynamically mark r5 cores as used When Linux boot takes over control of the pmu (by signaling PM_INIT_FINALIZE via ipi), pmu will switch off 'unused' rpu cores. The Xilinx zynqmp fsbl prevents switching off those cores by marking rpu cores as 'used' when loading code partitions to those cores. The current u-boot SPL is missing this behaviour, which results in halting rpu cores during Linux boot. This commit mimics the xilinx zynqmp fsbl behavior by marking r5 cores as used when they are released during boot. Signed-off-by: Lukas Funke Signed-off-by: Lukas Funke Link: https://lore.kernel.org/r/20221028121547.26464-2-lukas.funke-oss@weidmueller.com Signed-off-by: Michal Simek --- arch/arm/mach-zynqmp/include/mach/hardware.h | 4 ++- arch/arm/mach-zynqmp/mp.c | 26 ++++++++++++++++++++ 2 files changed, 29 insertions(+), 1 deletion(-) diff --git a/arch/arm/mach-zynqmp/include/mach/hardware.h b/arch/arm/mach-zynqmp/include/mach/hardware.h index a70d6d611b..70221e0305 100644 --- a/arch/arm/mach-zynqmp/include/mach/hardware.h +++ b/arch/arm/mach-zynqmp/include/mach/hardware.h @@ -175,7 +175,9 @@ struct csu_regs { #define ZYNQMP_PMU_BASEADDR 0xFFD80000 struct pmu_regs { - u32 reserved[18]; + u32 reserved0[16]; + u32 gen_storage4; /* 0x40 */ + u32 reserved1[1]; u32 gen_storage6; /* 0x48 */ }; diff --git a/arch/arm/mach-zynqmp/mp.c b/arch/arm/mach-zynqmp/mp.c index 949456d530..2891878973 100644 --- a/arch/arm/mach-zynqmp/mp.c +++ b/arch/arm/mach-zynqmp/mp.c @@ -42,6 +42,9 @@ #define ZYNQMP_MAX_CORES 6 +#define ZYNQMP_RPU0_USE_MASK BIT(1) +#define ZYNQMP_RPU1_USE_MASK BIT(2) + int is_core_valid(unsigned int core) { if (core < ZYNQMP_MAX_CORES) @@ -250,6 +253,27 @@ void initialize_tcm(bool mode) } } +static void mark_r5_used(u32 nr, u8 mode) +{ + u32 mask = 0; + + if (mode == LOCK) { + mask = ZYNQMP_RPU0_USE_MASK | ZYNQMP_RPU1_USE_MASK; + } else { + switch (nr) { + case ZYNQMP_CORE_RPU0: + mask = ZYNQMP_RPU0_USE_MASK; + break; + case ZYNQMP_CORE_RPU1: + mask = ZYNQMP_RPU1_USE_MASK; + break; + default: + return; + } + } + zynqmp_mmio_write((ulong)&pmu_base->gen_storage4, mask, mask); +} + int cpu_release(u32 nr, int argc, char *const argv[]) { if (nr <= ZYNQMP_CORE_APU3) { @@ -305,6 +329,7 @@ int cpu_release(u32 nr, int argc, char *const argv[]) write_tcm_boot_trampoline(boot_addr_uniq); dcache_enable(); set_r5_halt_mode(nr, RELEASE, LOCK); + mark_r5_used(nr, LOCK); } else if (!strncmp(argv[1], "split", 5)) { printf("R5 split mode\n"); set_r5_reset(nr, SPLIT); @@ -317,6 +342,7 @@ int cpu_release(u32 nr, int argc, char *const argv[]) write_tcm_boot_trampoline(boot_addr_uniq); dcache_enable(); set_r5_halt_mode(nr, RELEASE, SPLIT); + mark_r5_used(nr, SPLIT); } else { printf("Unsupported mode\n"); return 1; -- 2.39.5