diff options
Diffstat (limited to 'arch/arc')
| -rw-r--r-- | arch/arc/Kconfig | 8 | ||||
| -rw-r--r-- | arch/arc/boot/dts/skeleton.dtsi | 1 | ||||
| -rw-r--r-- | arch/arc/boot/dts/skeleton_hs.dtsi | 1 | ||||
| -rw-r--r-- | arch/arc/boot/dts/skeleton_hs_idu.dtsi | 21 | ||||
| -rw-r--r-- | arch/arc/boot/dts/vdk_axs10x_mb.dtsi | 20 | ||||
| -rw-r--r-- | arch/arc/include/asm/atomic.h | 3 | ||||
| -rw-r--r-- | arch/arc/include/asm/entry-arcv2.h | 10 | ||||
| -rw-r--r-- | arch/arc/include/asm/kprobes.h | 4 | ||||
| -rw-r--r-- | arch/arc/include/asm/ptrace.h | 4 | ||||
| -rw-r--r-- | arch/arc/kernel/entry-arcv2.S | 12 | ||||
| -rw-r--r-- | arch/arc/kernel/setup.c | 46 | ||||
| -rw-r--r-- | arch/arc/mm/cache.c | 3 |
12 files changed, 105 insertions, 28 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index c9f30f4..5d7fb3e 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -406,6 +406,14 @@ config ARC_HAS_DIV_REM bool "Insn: div, divu, rem, remu" default y +config ARC_HAS_ACCL_REGS + bool "Reg Pair ACCL:ACCH (FPU and/or MPY > 6)" + default n + help + Depending on the configuration, CPU can contain accumulator reg-pair + (also referred to as r58:r59). These can also be used by gcc as GPR so + kernel needs to save/restore per process + endif # ISA_ARCV2 endmenu # "ARC CPU Configuration" diff --git a/arch/arc/boot/dts/skeleton.dtsi b/arch/arc/boot/dts/skeleton.dtsi index 65808fe..2891cb2 100644 --- a/arch/arc/boot/dts/skeleton.dtsi +++ b/arch/arc/boot/dts/skeleton.dtsi @@ -26,6 +26,7 @@ device_type = "cpu"; compatible = "snps,arc770d"; reg = <0>; + clocks = <&core_clk>; }; }; diff --git a/arch/arc/boot/dts/skeleton_hs.dtsi b/arch/arc/boot/dts/skeleton_hs.dtsi index 2dfe803..5e944d3 100644 --- a/arch/arc/boot/dts/skeleton_hs.dtsi +++ b/arch/arc/boot/dts/skeleton_hs.dtsi @@ -21,6 +21,7 @@ device_type = "cpu"; compatible = "snps,archs38"; reg = <0>; + clocks = <&core_clk>; }; }; diff --git a/arch/arc/boot/dts/skeleton_hs_idu.dtsi b/arch/arc/boot/dts/skeleton_hs_idu.dtsi index 4c11079..54b277d 100644 --- a/arch/arc/boot/dts/skeleton_hs_idu.dtsi +++ b/arch/arc/boot/dts/skeleton_hs_idu.dtsi @@ -19,8 +19,27 @@ cpu@0 { device_type = "cpu"; - compatible = "snps,archs38xN"; + compatible = "snps,archs38"; reg = <0>; + clocks = <&core_clk>; + }; + cpu@1 { + device_type = "cpu"; + compatible = "snps,archs38"; + reg = <1>; + clocks = <&core_clk>; + }; + cpu@2 { + device_type = "cpu"; + compatible = "snps,archs38"; + reg = <2>; + clocks = <&core_clk>; + }; + cpu@3 { + device_type = "cpu"; + compatible = "snps,archs38"; + reg = <3>; + clocks = <&core_clk>; }; }; diff --git a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi index f0df59b..459fc65 100644 --- a/arch/arc/boot/dts/vdk_axs10x_mb.dtsi +++ b/arch/arc/boot/dts/vdk_axs10x_mb.dtsi @@ -112,13 +112,19 @@ interrupts = <7>; bus-width = <4>; }; + }; - /* Embedded Vision subsystem UIO mappings; only relevant for EV VDK */ - uio_ev: uio@0xD0000000 { - compatible = "generic-uio"; - reg = <0xD0000000 0x2000 0xD1000000 0x2000 0x90000000 0x10000000 0xC0000000 0x10000000>; - reg-names = "ev_gsa", "ev_ctrl", "ev_shared_mem", "ev_code_mem"; - interrupts = <23>; - }; + /* + * Embedded Vision subsystem UIO mappings; only relevant for EV VDK + * + * This node is intentionally put outside of MB above becase + * it maps areas outside of MB's 0xEz-0xFz. + */ + uio_ev: uio@0xD0000000 { + compatible = "generic-uio"; + reg = <0xD0000000 0x2000 0xD1000000 0x2000 0x90000000 0x10000000 0xC0000000 0x10000000>; + reg-names = "ev_gsa", "ev_ctrl", "ev_shared_mem", "ev_code_mem"; + interrupt-parent = <&mb_intc>; + interrupts = <23>; }; }; diff --git a/arch/arc/include/asm/atomic.h b/arch/arc/include/asm/atomic.h index b65930a..54b54da 100644 --- a/arch/arc/include/asm/atomic.h +++ b/arch/arc/include/asm/atomic.h @@ -17,10 +17,11 @@ #include <asm/barrier.h> #include <asm/smp.h> +#define ATOMIC_INIT(i) { (i) } + #ifndef CONFIG_ARC_PLAT_EZNPS #define atomic_read(v) READ_ONCE((v)->counter) -#define ATOMIC_INIT(i) { (i) } #ifdef CONFIG_ARC_HAS_LLSC diff --git a/arch/arc/include/asm/entry-arcv2.h b/arch/arc/include/asm/entry-arcv2.h index aee1a77..ac85380 100644 --- a/arch/arc/include/asm/entry-arcv2.h +++ b/arch/arc/include/asm/entry-arcv2.h @@ -16,6 +16,11 @@ ; ; Now manually save: r12, sp, fp, gp, r25 +#ifdef CONFIG_ARC_HAS_ACCL_REGS + PUSH r59 + PUSH r58 +#endif + PUSH r30 PUSH r12 @@ -75,6 +80,11 @@ POP r12 POP r30 +#ifdef CONFIG_ARC_HAS_ACCL_REGS + POP r58 + POP r59 +#endif + .endm /*------------------------------------------------------------------------*/ diff --git a/arch/arc/include/asm/kprobes.h b/arch/arc/include/asm/kprobes.h index 00bdbe1..2e52d18 100644 --- a/arch/arc/include/asm/kprobes.h +++ b/arch/arc/include/asm/kprobes.h @@ -54,9 +54,7 @@ int kprobe_fault_handler(struct pt_regs *regs, unsigned long cause); void kretprobe_trampoline(void); void trap_is_kprobe(unsigned long address, struct pt_regs *regs); #else -static void trap_is_kprobe(unsigned long address, struct pt_regs *regs) -{ -} +#define trap_is_kprobe(address, regs) #endif /* CONFIG_KPROBES */ #endif /* _ARC_KPROBES_H */ diff --git a/arch/arc/include/asm/ptrace.h b/arch/arc/include/asm/ptrace.h index 47111d5..5297faa 100644 --- a/arch/arc/include/asm/ptrace.h +++ b/arch/arc/include/asm/ptrace.h @@ -86,6 +86,10 @@ struct pt_regs { unsigned long r12, r30; +#ifdef CONFIG_ARC_HAS_ACCL_REGS + unsigned long r58, r59; /* ACCL/ACCH used by FPU / DSP MPY */ +#endif + /*------- Below list auto saved by h/w -----------*/ unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11; diff --git a/arch/arc/kernel/entry-arcv2.S b/arch/arc/kernel/entry-arcv2.S index 2585632..cc558a2 100644 --- a/arch/arc/kernel/entry-arcv2.S +++ b/arch/arc/kernel/entry-arcv2.S @@ -100,15 +100,21 @@ END(handle_interrupt) ;################### Non TLB Exception Handling ############################# ENTRY(EV_SWI) - flag 1 + ; TODO: implement this + EXCEPTION_PROLOGUE + b ret_from_exception END(EV_SWI) ENTRY(EV_DivZero) - flag 1 + ; TODO: implement this + EXCEPTION_PROLOGUE + b ret_from_exception END(EV_DivZero) ENTRY(EV_DCError) - flag 1 + ; TODO: implement this + EXCEPTION_PROLOGUE + b ret_from_exception END(EV_DCError) ; --------------------------------------------- diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c index 3093fa8..fc8211f 100644 --- a/arch/arc/kernel/setup.c +++ b/arch/arc/kernel/setup.c @@ -10,6 +10,7 @@ #include <linux/fs.h> #include <linux/delay.h> #include <linux/root_dev.h> +#include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/clocksource.h> #include <linux/console.h> @@ -318,7 +319,8 @@ static char *arc_extn_mumbojumbo(int cpu_id, char *buf, int len) static void arc_chk_core_config(void) { struct cpuinfo_arc *cpu = &cpuinfo_arc700[smp_processor_id()]; - int fpu_enabled; + int saved = 0, present = 0; + char *opt_nm = NULL;; if (!cpu->extn.timer0) panic("Timer0 is not present!\n"); @@ -345,17 +347,28 @@ static void arc_chk_core_config(void) /* * FP hardware/software config sanity - * -If hardware contains DPFP, kernel needs to save/restore FPU state + * -If hardware present, kernel needs to save/restore FPU state * -If not, it will crash trying to save/restore the non-existant regs - * - * (only DPDP checked since SP has no arch visible regs) */ - fpu_enabled = IS_ENABLED(CONFIG_ARC_FPU_SAVE_RESTORE); - if (cpu->extn.fpu_dp && !fpu_enabled) - pr_warn("CONFIG_ARC_FPU_SAVE_RESTORE needed for working apps\n"); - else if (!cpu->extn.fpu_dp && fpu_enabled) - panic("FPU non-existent, disable CONFIG_ARC_FPU_SAVE_RESTORE\n"); + if (is_isa_arcompact()) { + opt_nm = "CONFIG_ARC_FPU_SAVE_RESTORE"; + saved = IS_ENABLED(CONFIG_ARC_FPU_SAVE_RESTORE); + + /* only DPDP checked since SP has no arch visible regs */ + present = cpu->extn.fpu_dp; + } else { + opt_nm = "CONFIG_ARC_HAS_ACCL_REGS"; + saved = IS_ENABLED(CONFIG_ARC_HAS_ACCL_REGS); + + /* Accumulator Low:High pair (r58:59) present if DSP MPY or FPU */ + present = cpu->extn_mpy.dsp | cpu->extn.fpu_sp | cpu->extn.fpu_dp; + } + + if (present && !saved) + pr_warn("Enable %s for working apps\n", opt_nm); + else if (!present && saved) + panic("Disable %s, hardware NOT present\n", opt_nm); } /* @@ -488,8 +501,9 @@ static int show_cpuinfo(struct seq_file *m, void *v) { char *str; int cpu_id = ptr_to_cpu(v); - struct device_node *core_clk = of_find_node_by_name(NULL, "core_clk"); - u32 freq = 0; + struct device *cpu_dev = get_cpu_device(cpu_id); + struct clk *cpu_clk; + unsigned long freq = 0; if (!cpu_online(cpu_id)) { seq_printf(m, "processor [%d]\t: Offline\n", cpu_id); @@ -502,9 +516,15 @@ static int show_cpuinfo(struct seq_file *m, void *v) seq_printf(m, arc_cpu_mumbojumbo(cpu_id, str, PAGE_SIZE)); - of_property_read_u32(core_clk, "clock-frequency", &freq); + cpu_clk = clk_get(cpu_dev, NULL); + if (IS_ERR(cpu_clk)) { + seq_printf(m, "CPU speed \t: Cannot get clock for processor [%d]\n", + cpu_id); + } else { + freq = clk_get_rate(cpu_clk); + } if (freq) - seq_printf(m, "CPU speed\t: %u.%02u Mhz\n", + seq_printf(m, "CPU speed\t: %lu.%02lu Mhz\n", freq / 1000000, (freq / 10000) % 100); seq_printf(m, "Bogo MIPS\t: %lu.%02lu\n", diff --git a/arch/arc/mm/cache.c b/arch/arc/mm/cache.c index d408fa2..9285629 100644 --- a/arch/arc/mm/cache.c +++ b/arch/arc/mm/cache.c @@ -633,6 +633,9 @@ noinline static void slc_entire_op(const int op) write_aux_reg(ARC_REG_SLC_INVALIDATE, 1); + /* Make sure "busy" bit reports correct stataus, see STAR 9001165532 */ + read_aux_reg(r); + /* Important to wait for flush to complete */ while (read_aux_reg(r) & SLC_CTRL_BUSY); } |
