2 * Copyright (C) ST-Ericsson SA 2010
4 * Author: Rabin Vincent <rabin.vincent@stericsson.com> for ST-Ericsson
5 * License terms: GNU General Public License (GPL) version 2
8 #include <linux/platform_device.h>
9 #include <linux/amba/bus.h>
11 #include <linux/clk.h>
13 #include <asm/cacheflush.h>
14 #include <asm/hardware/cache-l2x0.h>
15 #include <asm/hardware/gic.h>
16 #include <asm/mach/map.h>
17 #include <asm/localtimer.h>
20 #include <mach/hardware.h>
21 #include <mach/setup.h>
22 #include <mach/devices.h>
26 static struct map_desc ux500_io_desc
[] __initdata
= {
27 __IO_DEV_DESC(UX500_UART0_BASE
, SZ_4K
),
28 __IO_DEV_DESC(UX500_UART2_BASE
, SZ_4K
),
30 __IO_DEV_DESC(UX500_GIC_CPU_BASE
, SZ_4K
),
31 __IO_DEV_DESC(UX500_GIC_DIST_BASE
, SZ_4K
),
32 __IO_DEV_DESC(UX500_L2CC_BASE
, SZ_4K
),
33 __IO_DEV_DESC(UX500_TWD_BASE
, SZ_4K
),
34 __IO_DEV_DESC(UX500_SCU_BASE
, SZ_4K
),
36 __IO_DEV_DESC(UX500_CLKRST1_BASE
, SZ_4K
),
37 __IO_DEV_DESC(UX500_CLKRST2_BASE
, SZ_4K
),
38 __IO_DEV_DESC(UX500_CLKRST3_BASE
, SZ_4K
),
39 __IO_DEV_DESC(UX500_CLKRST5_BASE
, SZ_4K
),
40 __IO_DEV_DESC(UX500_CLKRST6_BASE
, SZ_4K
),
42 __IO_DEV_DESC(UX500_MTU0_BASE
, SZ_4K
),
43 __IO_DEV_DESC(UX500_MTU1_BASE
, SZ_4K
),
45 __IO_DEV_DESC(UX500_BACKUPRAM0_BASE
, SZ_8K
),
48 static struct amba_device
*ux500_amba_devs
[] __initdata
= {
52 void __init
ux500_map_io(void)
54 iotable_init(ux500_io_desc
, ARRAY_SIZE(ux500_io_desc
));
57 void __init
ux500_init_devices(void)
59 amba_add_devices(ux500_amba_devs
, ARRAY_SIZE(ux500_amba_devs
));
62 void __init
ux500_init_irq(void)
64 gic_dist_init(0, __io_address(UX500_GIC_DIST_BASE
), 29);
65 gic_cpu_init(0, __io_address(UX500_GIC_CPU_BASE
));
68 * Init clocks here so that they are available for system timer
74 #ifdef CONFIG_CACHE_L2X0
75 static inline void ux500_cache_wait(void __iomem
*reg
, unsigned long mask
)
77 /* wait for the operation to complete */
78 while (readl(reg
) & mask
)
82 static inline void ux500_cache_sync(void)
84 void __iomem
*base
= __io_address(UX500_L2CC_BASE
);
85 writel(0, base
+ L2X0_CACHE_SYNC
);
86 ux500_cache_wait(base
+ L2X0_CACHE_SYNC
, 1);
90 * The L2 cache cannot be turned off in the non-secure world.
91 * Dummy until a secure service is in place.
93 static void ux500_l2x0_disable(void)
98 * This is only called when doing a kexec, just after turning off the L2
99 * and L1 cache, and it is surrounded by a spinlock in the generic version.
100 * However, we're not really turning off the L2 cache right now and the
101 * PL310 does not support exclusive accesses (used to implement the spinlock).
102 * So, the invalidation needs to be done without the spinlock.
104 static void ux500_l2x0_inv_all(void)
106 void __iomem
*l2x0_base
= __io_address(UX500_L2CC_BASE
);
107 uint32_t l2x0_way_mask
= (1<<16) - 1; /* Bitmask of active ways */
109 /* invalidate all ways */
110 writel(l2x0_way_mask
, l2x0_base
+ L2X0_INV_WAY
);
111 ux500_cache_wait(l2x0_base
+ L2X0_INV_WAY
, l2x0_way_mask
);
115 static int ux500_l2x0_init(void)
117 void __iomem
*l2x0_base
;
119 l2x0_base
= __io_address(UX500_L2CC_BASE
);
121 /* 64KB way size, 8 way associativity, force WA */
122 l2x0_init(l2x0_base
, 0x3e060000, 0xc0000fff);
124 /* Override invalidate function */
125 outer_cache
.disable
= ux500_l2x0_disable
;
126 outer_cache
.inv_all
= ux500_l2x0_inv_all
;
130 early_initcall(ux500_l2x0_init
);
133 static void __init
ux500_timer_init(void)
135 #ifdef CONFIG_LOCAL_TIMERS
136 /* Setup the local timer base */
137 twd_base
= __io_address(UX500_TWD_BASE
);
139 /* Setup the MTU base */
140 if (cpu_is_u8500ed())
141 mtu_base
= __io_address(U8500_MTU0_BASE_ED
);
143 mtu_base
= __io_address(UX500_MTU0_BASE
);
148 struct sys_timer ux500_timer
= {
149 .init
= ux500_timer_init
,
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