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In preparation for A15 support on ECX-2000, the direct calls to SCU registers must be conditional. The SCU power mode register is replaced by a custom register on ECX-2000. Rather than read the number of cores from the SCU, just hardcode it to 4. This removes one use of SCU and removes the need for the SCU to be statically mapped. The cpu initialization will ultimately come from DT. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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* Copyright 2011 Calxeda, Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef _MACH_HIGHBANK__SYSREGS_H_
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#define _MACH_HIGHBANK__SYSREGS_H_
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#include <linux/io.h>
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#include <linux/smp.h>
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#include <asm/smp_plat.h>
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#include <asm/smp_scu.h>
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#include "core.h"
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extern void __iomem *sregs_base;
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#define HB_SREG_A9_PWR_REQ 0xf00
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#define HB_SREG_A9_BOOT_STAT 0xf04
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#define HB_SREG_A9_BOOT_DATA 0xf08
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#define HB_PWR_SUSPEND 0
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#define HB_PWR_SOFT_RESET 1
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#define HB_PWR_HARD_RESET 2
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#define HB_PWR_SHUTDOWN 3
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#define SREG_CPU_PWR_CTRL(c) (0x200 + ((c) * 4))
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static inline void highbank_set_core_pwr(void)
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{
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int cpu = cpu_logical_map(smp_processor_id());
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if (scu_base_addr)
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scu_power_mode(scu_base_addr, SCU_PM_POWEROFF);
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else
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writel_relaxed(1, sregs_base + SREG_CPU_PWR_CTRL(cpu));
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}
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static inline void hignbank_set_pwr_suspend(void)
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{
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writel(HB_PWR_SUSPEND, sregs_base + HB_SREG_A9_PWR_REQ);
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highbank_set_core_pwr();
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}
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static inline void hignbank_set_pwr_shutdown(void)
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{
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writel(HB_PWR_SHUTDOWN, sregs_base + HB_SREG_A9_PWR_REQ);
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highbank_set_core_pwr();
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}
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static inline void hignbank_set_pwr_soft_reset(void)
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{
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writel(HB_PWR_SOFT_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
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highbank_set_core_pwr();
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}
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static inline void hignbank_set_pwr_hard_reset(void)
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{
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writel(HB_PWR_HARD_RESET, sregs_base + HB_SREG_A9_PWR_REQ);
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highbank_set_core_pwr();
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}
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#endif
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