omap4-common.c revision 11e0264046e00544eb044fafc27125babd105e41 
1/*
2 * OMAP4 specific common source file.
3 *
4 * Copyright (C) 2010 Texas Instruments, Inc.
5 * Author:
6 *	Santosh Shilimkar <santosh.shilimkar@ti.com>
7 *
8 *
9 * This program is free software,you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/kernel.h>
15#include <linux/init.h>
16#include <linux/io.h>
17#include <linux/platform_device.h>
18
19#include <asm/hardware/gic.h>
20#include <asm/hardware/cache-l2x0.h>
21
22#include <mach/hardware.h>
23#include <mach/omap4-common.h>
24
25#ifdef CONFIG_CACHE_L2X0
26void __iomem *l2cache_base;
27#endif
28
29void __iomem *gic_cpu_base_addr;
30void __iomem *gic_dist_base_addr;
31
32
33void __init gic_init_irq(void)
34{
35	/* Static mapping, never released */
36	gic_dist_base_addr = ioremap(OMAP44XX_GIC_DIST_BASE, SZ_4K);
37	BUG_ON(!gic_dist_base_addr);
38	gic_dist_init(0, gic_dist_base_addr, 29);
39
40	/* Static mapping, never released */
41	gic_cpu_base_addr = ioremap(OMAP44XX_GIC_CPU_BASE, SZ_512);
42	BUG_ON(!gic_cpu_base_addr);
43	gic_cpu_init(0, gic_cpu_base_addr);
44}
45
46#ifdef CONFIG_CACHE_L2X0
47
48static void omap4_l2x0_disable(void)
49{
50	/* Disable PL310 L2 Cache controller */
51	omap_smc1(0x102, 0x0);
52}
53
54static int __init omap_l2_cache_init(void)
55{
56	u32 aux_ctrl = 0;
57
58	/*
59	 * To avoid code running on other OMAPs in
60	 * multi-omap builds
61	 */
62	if (!cpu_is_omap44xx())
63		return -ENODEV;
64
65	/* Static mapping, never released */
66	l2cache_base = ioremap(OMAP44XX_L2CACHE_BASE, SZ_4K);
67	BUG_ON(!l2cache_base);
68
69	/*
70	 * 16-way associativity, parity disabled
71	 * Way size - 32KB (es1.0)
72	 * Way size - 64KB (es2.0 +)
73	 */
74	aux_ctrl = ((1 << L2X0_AUX_CTRL_ASSOCIATIVITY_SHIFT) |
75			(0x1 << 25) |
76			(0x1 << L2X0_AUX_CTRL_NS_LOCKDOWN_SHIFT) |
77			(0x1 << L2X0_AUX_CTRL_NS_INT_CTRL_SHIFT));
78
79	if (omap_rev() == OMAP4430_REV_ES1_0) {
80		aux_ctrl |= 0x2 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT;
81	} else {
82		aux_ctrl |= ((0x3 << L2X0_AUX_CTRL_WAY_SIZE_SHIFT) |
83			(1 << L2X0_AUX_CTRL_DATA_PREFETCH_SHIFT) |
84			(1 << L2X0_AUX_CTRL_INSTR_PREFETCH_SHIFT));
85	}
86	if (omap_rev() != OMAP4430_REV_ES1_0)
87		omap_smc1(0x109, aux_ctrl);
88
89	/* Enable PL310 L2 Cache controller */
90	omap_smc1(0x102, 0x1);
91
92	l2x0_init(l2cache_base, aux_ctrl, L2X0_AUX_CTRL_MASK);
93
94	/*
95	 * Override default outer_cache.disable with a OMAP4
96	 * specific one
97	*/
98	outer_cache.disable = omap4_l2x0_disable;
99
100	return 0;
101}
102early_initcall(omap_l2_cache_init);
103#endif
104