diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/arm/Kconfig | 2 | ||||
| -rw-r--r-- | arch/arm/Makefile | 1 | ||||
| -rw-r--r-- | arch/arm/boot/dts/st-pincfg.h | 71 | ||||
| -rw-r--r-- | arch/arm/boot/dts/stih415-clock.dtsi | 38 | ||||
| -rw-r--r-- | arch/arm/boot/dts/stih415-pinctrl.dtsi | 268 | ||||
| -rw-r--r-- | arch/arm/boot/dts/stih415.dtsi | 87 | ||||
| -rw-r--r-- | arch/arm/boot/dts/stih41x.dtsi | 38 | ||||
| -rw-r--r-- | arch/arm/mach-sti/Kconfig | 36 | ||||
| -rw-r--r-- | arch/arm/mach-sti/Makefile | 2 | ||||
| -rw-r--r-- | arch/arm/mach-sti/board-dt.c | 47 | ||||
| -rw-r--r-- | arch/arm/mach-sti/headsmp.S | 44 | ||||
| -rw-r--r-- | arch/arm/mach-sti/platsmp.c | 117 | ||||
| -rw-r--r-- | arch/arm/mach-sti/smp.h | 17 |
13 files changed, 768 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 49d993cee512..751386450809 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -989,6 +989,8 @@ source "arch/arm/mach-socfpga/Kconfig" source "arch/arm/mach-spear/Kconfig" +source "arch/arm/mach-sti/Kconfig" + source "arch/arm/mach-s3c24xx/Kconfig" if ARCH_S3C64XX diff --git a/arch/arm/Makefile b/arch/arm/Makefile index 1ba358ba16b8..ef8b1943dcc5 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -191,6 +191,7 @@ machine-$(CONFIG_ARCH_W90X900) += w90x900 machine-$(CONFIG_FOOTBRIDGE) += footbridge machine-$(CONFIG_ARCH_SOCFPGA) += socfpga machine-$(CONFIG_PLAT_SPEAR) += spear +machine-$(CONFIG_ARCH_STI) += sti machine-$(CONFIG_ARCH_VIRT) += virt machine-$(CONFIG_ARCH_ZYNQ) += zynq machine-$(CONFIG_ARCH_SUNXI) += sunxi diff --git a/arch/arm/boot/dts/st-pincfg.h b/arch/arm/boot/dts/st-pincfg.h new file mode 100644 index 000000000000..8c45d85ac13e --- /dev/null +++ b/arch/arm/boot/dts/st-pincfg.h @@ -0,0 +1,71 @@ +#ifndef _ST_PINCFG_H_ +#define _ST_PINCFG_H_ + +/* Alternate functions */ +#define ALT1 1 +#define ALT2 2 +#define ALT3 3 +#define ALT4 4 +#define ALT5 5 +#define ALT6 6 +#define ALT7 7 + +/* Output enable */ +#define OE (1 << 27) +/* Pull Up */ +#define PU (1 << 26) +/* Open Drain */ +#define OD (1 << 26) +#define RT (1 << 23) +#define INVERTCLK (1 << 22) +#define CLKNOTDATA (1 << 21) +#define DOUBLE_EDGE (1 << 20) +#define CLK_A (0 << 18) +#define CLK_B (1 << 18) +#define CLK_C (2 << 18) +#define CLK_D (3 << 18) + +/* User-frendly defines for Pin Direction */ + /* oe = 0, pu = 0, od = 0 */ +#define IN (0) + /* oe = 0, pu = 1, od = 0 */ +#define IN_PU (PU) + /* oe = 1, pu = 0, od = 0 */ +#define OUT (OE) + /* oe = 1, pu = 0, od = 1 */ +#define BIDIR (OE | OD) + /* oe = 1, pu = 1, od = 1 */ +#define BIDIR_PU (OE | PU | OD) + +/* RETIME_TYPE */ +/* + * B Mode + * Bypass retime with optional delay parameter + */ +#define BYPASS (0) +/* + * R0, R1, R0D, R1D modes + * single-edge data non inverted clock, retime data with clk + */ +#define SE_NICLK_IO (RT) +/* + * RIV0, RIV1, RIV0D, RIV1D modes + * single-edge data inverted clock, retime data with clk + */ +#define SE_ICLK_IO (RT | INVERTCLK) +/* + * R0E, R1E, R0ED, R1ED modes + * double-edge data, retime data with clk + */ +#define DE_IO (RT | DOUBLE_EDGE) +/* + * CIV0, CIV1 modes with inverted clock + * Retiming the clk pins will park clock & reduce the noise within the core. + */ +#define ICLK (RT | CLKNOTDATA | INVERTCLK) +/* + * CLK0, CLK1 modes with non-inverted clock + * Retiming the clk pins will park clock & reduce the noise within the core. + */ +#define NICLK (RT | CLKNOTDATA) +#endif /* _ST_PINCFG_H_ */ diff --git a/arch/arm/boot/dts/stih415-clock.dtsi b/arch/arm/boot/dts/stih415-clock.dtsi new file mode 100644 index 000000000000..174c799df741 --- /dev/null +++ b/arch/arm/boot/dts/stih415-clock.dtsi @@ -0,0 +1,38 @@ +/* + * Copyright (C) 2013 STMicroelectronics (R&D) Limited + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +/ { + clocks { + /* + * Fixed 30MHz oscillator input to SoC + */ + CLK_SYSIN: CLK_SYSIN { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <30000000>; + }; + + /* + * ARM Peripheral clock for timers + */ + arm_periph_clk: arm_periph_clk { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <500000000>; + }; + + /* + * Bootloader initialized system infrastructure clock for + * serial devices. + */ + CLKS_ICN_REG_0: CLKS_ICN_REG_0 { + #clock-cells = <0>; + compatible = "fixed-clock"; + clock-frequency = <100000000>; + }; + }; +}; diff --git a/arch/arm/boot/dts/stih415-pinctrl.dtsi b/arch/arm/boot/dts/stih415-pinctrl.dtsi new file mode 100644 index 000000000000..1d322b24d1e4 --- /dev/null +++ b/arch/arm/boot/dts/stih415-pinctrl.dtsi @@ -0,0 +1,268 @@ +/* + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * Author: Srinivas Kandagatla <srinivas.kandagatla@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * publishhed by the Free Software Foundation. + */ +#include "st-pincfg.h" +/ { + + aliases { + gpio0 = &PIO0; + gpio1 = &PIO1; + gpio2 = &PIO2; + gpio3 = &PIO3; + gpio4 = &PIO4; + gpio5 = &PIO5; + gpio6 = &PIO6; + gpio7 = &PIO7; + gpio8 = &PIO8; + gpio9 = &PIO9; + gpio10 = &PIO10; + gpio11 = &PIO11; + gpio12 = &PIO12; + gpio13 = &PIO13; + gpio14 = &PIO14; + gpio15 = &PIO15; + gpio16 = &PIO16; + gpio17 = &PIO17; + gpio18 = &PIO18; + gpio19 = &PIO100; + gpio20 = &PIO101; + gpio21 = &PIO102; + gpio22 = &PIO103; + gpio23 = &PIO104; + gpio24 = &PIO105; + gpio25 = &PIO106; + gpio26 = &PIO107; + }; + + soc { + pin-controller-sbc { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,stih415-sbc-pinctrl"; + st,syscfg = <&syscfg_sbc>; + ranges = <0 0xfe610000 0x5000>; + + PIO0: gpio@fe610000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0 0x100>; + st,bank-name = "PIO0"; + }; + PIO1: gpio@fe611000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x1000 0x100>; + st,bank-name = "PIO1"; + }; + PIO2: gpio@fe612000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x2000 0x100>; + st,bank-name = "PIO2"; + }; + PIO3: gpio@fe613000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x3000 0x100>; + st,bank-name = "PIO3"; + }; + PIO4: gpio@fe614000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x4000 0x100>; + st,bank-name = "PIO4"; + }; + + sbc_serial1 { + pinctrl_sbc_serial1:sbc_serial1 { + st,pins { + tx = <&PIO2 6 ALT3 OUT>; + rx = <&PIO2 7 ALT3 IN>; + }; + }; + }; + }; + + pin-controller-front { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,stih415-front-pinctrl"; + st,syscfg = <&syscfg_front>; + ranges = <0 0xfee00000 0x8000>; + + PIO5: gpio@fee00000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0 0x100>; + st,bank-name = "PIO5"; + }; + PIO6: gpio@fee01000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x1000 0x100>; + st,bank-name = "PIO6"; + }; + PIO7: gpio@fee02000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x2000 0x100>; + st,bank-name = "PIO7"; + }; + PIO8: gpio@fee03000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x3000 0x100>; + st,bank-name = "PIO8"; + }; + PIO9: gpio@fee04000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x4000 0x100>; + st,bank-name = "PIO9"; + }; + PIO10: gpio@fee05000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x5000 0x100>; + st,bank-name = "PIO10"; + }; + PIO11: gpio@fee06000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x6000 0x100>; + st,bank-name = "PIO11"; + }; + PIO12: gpio@fee07000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x7000 0x100>; + st,bank-name = "PIO12"; + }; + }; + + pin-controller-rear { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,stih415-rear-pinctrl"; + st,syscfg = <&syscfg_rear>; + ranges = <0 0xfe820000 0x8000>; + + PIO13: gpio@fe820000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0 0x100>; + st,bank-name = "PIO13"; + }; + PIO14: gpio@fe821000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x1000 0x100>; + st,bank-name = "PIO14"; + }; + PIO15: gpio@fe822000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x2000 0x100>; + st,bank-name = "PIO15"; + }; + PIO16: gpio@fe823000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x3000 0x100>; + st,bank-name = "PIO16"; + }; + PIO17: gpio@fe824000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x4000 0x100>; + st,bank-name = "PIO17"; + }; + PIO18: gpio@fe825000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x5000 0x100>; + st,bank-name = "PIO18"; + }; + + serial2 { + pinctrl_serial2: serial2-0 { + st,pins { + tx = <&PIO17 4 ALT2 OUT>; + rx = <&PIO17 5 ALT2 IN>; + }; + }; + }; + }; + + pin-controller-left { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,stih415-left-pinctrl"; + st,syscfg = <&syscfg_left>; + ranges = <0 0xfd6b0000 0x3000>; + + PIO100: gpio@fd6b0000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0 0x100>; + st,bank-name = "PIO100"; + }; + PIO101: gpio@fd6b1000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x1000 0x100>; + st,bank-name = "PIO101"; + }; + PIO102: gpio@fd6b2000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x2000 0x100>; + st,bank-name = "PIO102"; + }; + }; + + pin-controller-right { + #address-cells = <1>; + #size-cells = <1>; + compatible = "st,stih415-right-pinctrl"; + st,syscfg = <&syscfg_right>; + ranges = <0 0xfd330000 0x5000>; + + PIO103: gpio@fd330000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0 0x100>; + st,bank-name = "PIO103"; + }; + PIO104: gpio@fd331000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x1000 0x100>; + st,bank-name = "PIO104"; + }; + PIO105: gpio@fd332000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x2000 0x100>; + st,bank-name = "PIO105"; + }; + PIO106: gpio@fd333000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x3000 0x100>; + st,bank-name = "PIO106"; + }; + PIO107: gpio@fd334000 { + gpio-controller; + #gpio-cells = <1>; + reg = <0x4000 0x100>; + st,bank-name = "PIO107"; + }; + }; + }; +}; diff --git a/arch/arm/boot/dts/stih415.dtsi b/arch/arm/boot/dts/stih415.dtsi new file mode 100644 index 000000000000..74ab8ded4b49 --- /dev/null +++ b/arch/arm/boot/dts/stih415.dtsi @@ -0,0 +1,87 @@ +/* + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * Author: Srinivas Kandagatla <srinivas.kandagatla@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * publishhed by the Free Software Foundation. + */ +#include "stih41x.dtsi" +#include "stih415-clock.dtsi" +#include "stih415-pinctrl.dtsi" +/ { + + L2: cache-controller { + compatible = "arm,pl310-cache"; + reg = <0xfffe2000 0x1000>; + arm,data-latency = <3 2 2>; + arm,tag-latency = <1 1 1>; + cache-unified; + cache-level = <2>; + }; + + soc { + #address-cells = <1>; + #size-cells = <1>; + interrupt-parent = <&intc>; + ranges; + compatible = "simple-bus"; + + syscfg_sbc: sbc-syscfg@fe600000{ + compatible = "st,stih415-sbc-syscfg", "syscon"; + reg = <0xfe600000 0xb4>; + }; + + syscfg_front: front-syscfg@fee10000{ + compatible = "st,stih415-front-syscfg", "syscon"; + reg = <0xfee10000 0x194>; + }; + + syscfg_rear: rear-syscfg@fe830000{ + compatible = "st,stih415-rear-syscfg", "syscon"; + reg = <0xfe830000 0x190>; + }; + + /* MPE syscfgs */ + syscfg_left: left-syscfg@fd690000{ + compatible = "st,stih415-left-syscfg", "syscon"; + reg = <0xfd690000 0x78>; + }; + + syscfg_right: right-syscfg@fd320000{ + compatible = "st,stih415-right-syscfg", "syscon"; + reg = <0xfd320000 0x180>; + }; + + syscfg_system: system-syscfg@fdde0000 { + compatible = "st,stih415-system-syscfg", "syscon"; + reg = <0xfdde0000 0x15c>; + }; + + syscfg_lpm: lpm-syscfg@fe4b5100{ + compatible = "st,stih415-lpm-syscfg", "syscon"; + reg = <0xfe4b5100 0x08>; + }; + + serial2: serial@fed32000 { + compatible = "st,asc"; + status = "disabled"; + reg = <0xfed32000 0x2c>; + interrupts = <0 197 0>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_serial2>; + clocks = <&CLKS_ICN_REG_0>; + }; + + /* SBC comms block ASCs in SASG1 */ + sbc_serial1: serial@fe531000 { + compatible = "st,asc"; + status = "disabled"; + reg = <0xfe531000 0x2c>; + interrupts = <0 210 0>; + clocks = <&CLK_SYSIN>; + pinctrl-names = "default"; + pinctrl-0 = <&pinctrl_sbc_serial1>; + }; + }; +}; diff --git a/arch/arm/boot/dts/stih41x.dtsi b/arch/arm/boot/dts/stih41x.dtsi new file mode 100644 index 000000000000..7321403cab8a --- /dev/null +++ b/arch/arm/boot/dts/stih41x.dtsi @@ -0,0 +1,38 @@ +/ { + #address-cells = <1>; + #size-cells = <1>; + + cpus { + #address-cells = <1>; + #size-cells = <0>; + cpu@0 { + compatible = "arm,cortex-a9"; + reg = <0>; + }; + cpu@1 { + compatible = "arm,cortex-a9"; + reg = <1>; + }; + }; + + intc: interrupt-controller@fffe1000 { + compatible = "arm,cortex-a9-gic"; + #interrupt-cells = <3>; + interrupt-controller; + reg = <0xfffe1000 0x1000>, + <0xfffe0100 0x100>; + }; + + scu@fffe0000 { + compatible = "arm,cortex-a9-scu"; + reg = <0xfffe0000 0x1000>; + }; + + timer@fffe0200 { + interrupt-parent = <&intc>; + compatible = "arm,cortex-a9-global-timer"; + reg = <0xfffe0200 0x100>; + interrupts = <1 11 0x04>; + clocks = <&arm_periph_clk>; + }; +}; diff --git a/arch/arm/mach-sti/Kconfig b/arch/arm/mach-sti/Kconfig new file mode 100644 index 000000000000..23405b584adb --- /dev/null +++ b/arch/arm/mach-sti/Kconfig @@ -0,0 +1,36 @@ +menuconfig ARCH_STI + bool "STMicroelectronics Consumer Electronics SOCs with Device Trees" if ARCH_MULTI_V7 + select GENERIC_CLOCKEVENTS + select CLKDEV_LOOKUP + select ARM_GIC + select ARM_GLOBAL_TIMER + select PINCTRL + select PINCTRL_ST + select MFD_SYSCON + select MIGHT_HAVE_CACHE_L2X0 + select HAVE_SMP + select HAVE_ARM_SCU if SMP + select ARCH_REQUIRE_GPIOLIB + select ARM_ERRATA_720789 + select ARM_ERRATA_754322 + select PL310_ERRATA_753970 if CACHE_PL310 + select PL310_ERRATA_769419 if CACHE_PL310 + help + Include support for STiH41x SOCs like STiH415/416 using the device tree + for discovery + More information at Documentation/arm/STiH41x and + at Documentation/devicetree + + +if ARCH_STI + +config SOC_STIH415 + bool "STiH415 STMicroelectronics Consumer Electronics family" + default y + help + This enables support for STMicroelectronics Digital Consumer + Electronics family StiH415 parts, primarily targetted at set-top-box + and other digital audio/video applications using Flattned Device + Trees. + +endif diff --git a/arch/arm/mach-sti/Makefile b/arch/arm/mach-sti/Makefile new file mode 100644 index 000000000000..acb330916333 --- /dev/null +++ b/arch/arm/mach-sti/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_SMP) += platsmp.o headsmp.o +obj-$(CONFIG_ARCH_STI) += board-dt.o diff --git a/arch/arm/mach-sti/board-dt.c b/arch/arm/mach-sti/board-dt.c new file mode 100644 index 000000000000..3faf64221d45 --- /dev/null +++ b/arch/arm/mach-sti/board-dt.c @@ -0,0 +1,47 @@ +/* + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * Author(s): Srinivas Kandagatla <srinivas.kandagatla@st.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/clk-provider.h> +#include <linux/clocksource.h> +#include <linux/irq.h> +#include <asm/hardware/cache-l2x0.h> +#include <asm/mach/arch.h> + +#include "smp.h" + +void __init stih41x_l2x0_init(void) +{ + u32 way_size = 0x4; + u32 aux_ctrl; + /* may be this can be encoded in macros like BIT*() */ + aux_ctrl = (0x1 << L2X0_AUX_CTRL_SHARE_OVERRIDE_SHIFT) | + (0x1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) | + (0x1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT) | + (way_size << L2X0_AUX_CTRL_WAY_SIZE_SHIFT); + + l2x0_of_init(aux_ctrl, L2X0_AUX_CTRL_MASK); +} + +static void __init stih41x_timer_init(void) +{ + of_clk_init(NULL); + clocksource_of_init(); + stih41x_l2x0_init(); +} + +static const char *stih41x_dt_match[] __initdata = { + "st,stih415", + NULL +}; + +DT_MACHINE_START(STM, "STiH415 SoC with Flattened Device Tree") + .init_time = stih41x_timer_init, + .smp = smp_ops(sti_smp_ops), + .dt_compat = stih41x_dt_match, +MACHINE_END diff --git a/arch/arm/mach-sti/headsmp.S b/arch/arm/mach-sti/headsmp.S new file mode 100644 index 000000000000..78ebc7559f53 --- /dev/null +++ b/arch/arm/mach-sti/headsmp.S @@ -0,0 +1,44 @@ +/* + * arch/arm/mach-sti/headsmp.S + * + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * http://www.st.com + * + * Cloned from linux/arch/arm/mach-vexpress/headsmp.S + * + * Copyright (c) 2003 ARM Limited + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/linkage.h> +#include <linux/init.h> + + __INIT + +/* + * ST specific entry point for secondary CPUs. This provides + * a "holding pen" into which all secondary cores are held until we're + * ready for them to initialise. + */ +ENTRY(sti_secondary_startup) + mrc p15, 0, r0, c0, c0, 5 + and r0, r0, #15 + adr r4, 1f + ldmia r4, {r5, r6} + sub r4, r4, r5 + add r6, r6, r4 +pen: ldr r7, [r6] + cmp r7, r0 + bne pen + + /* + * we've been released from the holding pen: secondary_stack + * should now contain the SVC stack for this core + */ + b secondary_startup + +1: .long . + .long pen_release diff --git a/arch/arm/mach-sti/platsmp.c b/arch/arm/mach-sti/platsmp.c new file mode 100644 index 000000000000..977a863468fc --- /dev/null +++ b/arch/arm/mach-sti/platsmp.c @@ -0,0 +1,117 @@ +/* + * arch/arm/mach-sti/platsmp.c + * + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * http://www.st.com + * + * Cloned from linux/arch/arm/mach-vexpress/platsmp.c + * + * Copyright (C) 2002 ARM Ltd. + * All Rights Reserved + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ +#include <linux/init.h> +#include <linux/errno.h> +#include <linux/delay.h> +#include <linux/smp.h> +#include <linux/io.h> +#include <linux/of.h> +#include <linux/of_address.h> + +#include <asm/cacheflush.h> +#include <asm/smp_plat.h> +#include <asm/smp_scu.h> + +#include "smp.h" + +static void __cpuinit write_pen_release(int val) +{ + pen_release = val; + smp_wmb(); + __cpuc_flush_dcache_area((void *)&pen_release, sizeof(pen_release)); + outer_clean_range(__pa(&pen_release), __pa(&pen_release + 1)); +} + +static DEFINE_SPINLOCK(boot_lock); + +void __cpuinit sti_secondary_init(unsigned int cpu) +{ + trace_hardirqs_off(); + + /* + * let the primary processor know we're out of the + * pen, then head off into the C entry point + */ + write_pen_release(-1); + + /* + * Synchronise with the boot thread. + */ + spin_lock(&boot_lock); + spin_unlock(&boot_lock); +} + +int __cpuinit sti_boot_secondary(unsigned int cpu, struct task_struct *idle) +{ + unsigned long timeout; + + /* + * set synchronisation state between this boot processor + * and the secondary one + */ + spin_lock(&boot_lock); + + /* + * The secondary processor is waiting to be released from + * the holding pen - release it, then wait for it to flag + * that it has been released by resetting pen_release. + * + * Note that "pen_release" is the hardware CPU ID, whereas + * "cpu" is Linux's internal ID. + */ + write_pen_release(cpu_logical_map(cpu)); + + /* + * Send the secondary CPU a soft interrupt, thereby causing + * it to jump to the secondary entrypoint. + */ + arch_send_wakeup_ipi_mask(cpumask_of(cpu)); + + timeout = jiffies + (1 * HZ); + while (time_before(jiffies, timeout)) { + smp_rmb(); + if (pen_release == -1) + break; + + udelay(10); + } + + /* + * now the secondary core is starting up let it run its + * calibrations, then wait for it to finish + */ + spin_unlock(&boot_lock); + + return pen_release != -1 ? -ENOSYS : 0; +} + +void __init sti_smp_prepare_cpus(unsigned int max_cpus) +{ + void __iomem *scu_base = NULL; + struct device_node *np = of_find_compatible_node( + NULL, NULL, "arm,cortex-a9-scu"); + if (np) { + scu_base = of_iomap(np, 0); + scu_enable(scu_base); + of_node_put(np); + } +} + +struct smp_operations __initdata sti_smp_ops = { + .smp_prepare_cpus = sti_smp_prepare_cpus, + .smp_secondary_init = sti_secondary_init, + .smp_boot_secondary = sti_boot_secondary, +}; diff --git a/arch/arm/mach-sti/smp.h b/arch/arm/mach-sti/smp.h new file mode 100644 index 000000000000..1871b72b1a7e --- /dev/null +++ b/arch/arm/mach-sti/smp.h @@ -0,0 +1,17 @@ +/* + * arch/arm/mach-sti/smp.h + * + * Copyright (C) 2013 STMicroelectronics (R&D) Limited. + * http://www.st.com + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#ifndef __MACH_STI_SMP_H +#define __MACH_STI_SMP_H + +extern struct smp_operations sti_smp_ops; + +#endif |