1 // SPDX-License-Identifier: GPL-2.0
3  * R-Car Generation 2 Power management support
5  * Copyright (C) 2013 - 2015  Renesas Electronics Corporation
18 #include "rcar-gen2.h"
33 #define CA15RESCNT_CPUS	0xf		/* CPU0-3 */
35 #define CA7RESCNT_CPUS	0xf		/* CPU0-3 */
37 /* On-chip RAM */
47 	void __iomem *p;  in rcar_gen2_pm_init()  local
60 		if (of_device_is_compatible(np, "arm,cortex-a15"))  in rcar_gen2_pm_init()
62 		else if (of_device_is_compatible(np, "arm,cortex-a7"))  in rcar_gen2_pm_init()
66 	np = of_find_compatible_node(NULL, NULL, "renesas,smp-sram");  in rcar_gen2_pm_init()
68 		/* No smp-sram in DT, fall back to hardcoded address */  in rcar_gen2_pm_init()
77 		pr_err("Failed to get smp-sram address: %d\n", error);  in rcar_gen2_pm_init()
82 	/* RAM for jump stub, because BAR requires 256KB aligned address */  in rcar_gen2_pm_init()
83 	if (res.start & (256 * 1024 - 1) ||  in rcar_gen2_pm_init()
85 		pr_err("Invalid smp-sram region\n");  in rcar_gen2_pm_init()
89 	p = ioremap(res.start, resource_size(&res));  in rcar_gen2_pm_init()
90 	if (!p)  in rcar_gen2_pm_init()
98 		memcpy_toio(p, shmobile_boot_vector_gen2,  in rcar_gen2_pm_init()
101 		memcpy_toio(p, shmobile_boot_vector, shmobile_boot_size);  in rcar_gen2_pm_init()
103 	iounmap(p);  in rcar_gen2_pm_init()
106 	p = ioremap(RST, 0x63);  in rcar_gen2_pm_init()
109 		writel_relaxed(bar, p + CA15BAR);  in rcar_gen2_pm_init()
110 		writel_relaxed(bar | SBAR_BAREN, p + CA15BAR);  in rcar_gen2_pm_init()
112 		/* de-assert reset for CA15 CPUs */  in rcar_gen2_pm_init()
113 		writel_relaxed((readl_relaxed(p + CA15RESCNT) &  in rcar_gen2_pm_init()
115 			       p + CA15RESCNT);  in rcar_gen2_pm_init()
118 		writel_relaxed(bar, p + CA7BAR);  in rcar_gen2_pm_init()
119 		writel_relaxed(bar | SBAR_BAREN, p + CA7BAR);  in rcar_gen2_pm_init()
121 		/* de-assert reset for CA7 CPUs */  in rcar_gen2_pm_init()
122 		writel_relaxed((readl_relaxed(p + CA7RESCNT) &  in rcar_gen2_pm_init()
124 			       p + CA7RESCNT);  in rcar_gen2_pm_init()
126 	iounmap(p);  in rcar_gen2_pm_init()