1 /*
2  * OMAP4 PRCM_MPU module functions
3  *
4  * Copyright (C) 2009 Nokia Corporation
5  * Paul Walmsley
6  *
7  * This program is free software; you can redistribute it and/or modify
8  * it under the terms of the GNU General Public License version 2 as
9  * published by the Free Software Foundation.
10  */
11 
12 #include <linux/kernel.h>
13 #include <linux/types.h>
14 #include <linux/errno.h>
15 #include <linux/err.h>
16 #include <linux/io.h>
17 
18 #include "iomap.h"
19 #include "common.h"
20 #include "prcm_mpu44xx.h"
21 #include "cm-regbits-44xx.h"
22 
23 /*
24  * prcm_mpu_base: the virtual address of the start of the PRCM_MPU IP
25  *   block registers
26  */
27 void __iomem *prcm_mpu_base;
28 
29 /* PRCM_MPU low-level functions */
30 
31 u32 omap4_prcm_mpu_read_inst_reg(s16 inst, u16 reg)
32 {
33 	return readl_relaxed(OMAP44XX_PRCM_MPU_REGADDR(inst, reg));
34 }
35 
36 void omap4_prcm_mpu_write_inst_reg(u32 val, s16 inst, u16 reg)
37 {
38 	writel_relaxed(val, OMAP44XX_PRCM_MPU_REGADDR(inst, reg));
39 }
40 
41 u32 omap4_prcm_mpu_rmw_inst_reg_bits(u32 mask, u32 bits, s16 inst, s16 reg)
42 {
43 	u32 v;
44 
45 	v = omap4_prcm_mpu_read_inst_reg(inst, reg);
46 	v &= ~mask;
47 	v |= bits;
48 	omap4_prcm_mpu_write_inst_reg(v, inst, reg);
49 
50 	return v;
51 }
52 
53 /**
54  * omap2_set_globals_prcm_mpu - set the MPU PRCM base address (for early use)
55  * @prcm_mpu: PRCM_MPU base virtual address
56  *
57  * XXX Will be replaced when the PRM/CM drivers are completed.
58  */
59 void __init omap2_set_globals_prcm_mpu(void __iomem *prcm_mpu)
60 {
61 	prcm_mpu_base = prcm_mpu;
62 }
63