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exynos_platform.c revision 1.3 
      1 /* $NetBSD: exynos_platform.c,v 1.3 2017/06/11 01:09:44 jmcneill Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2017 Jared D. McNeill <jmcneill (at) invisible.ca>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
     21  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     22  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
     23  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
     24  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 #include "opt_exynos.h"
     30 #include "opt_multiprocessor.h"
     31 #include "opt_fdt_arm.h"
     32 
     33 #include "ukbd.h"
     34 
     35 #include <sys/cdefs.h>
     36 __KERNEL_RCSID(0, "$NetBSD: exynos_platform.c,v 1.3 2017/06/11 01:09:44 jmcneill Exp $");
     37 
     38 #include <sys/param.h>
     39 #include <sys/bus.h>
     40 #include <sys/cpu.h>
     41 #include <sys/device.h>
     42 #include <sys/termios.h>
     43 
     44 #include <dev/fdt/fdtvar.h>
     45 
     46 #include <uvm/uvm_extern.h>
     47 
     48 #include <machine/bootconfig.h>
     49 #include <arm/cpufunc.h>
     50 
     51 #include <arm/samsung/exynos_reg.h>
     52 #include <arm/samsung/exynos_var.h>
     53 
     54 #include <evbarm/exynos/platform.h>
     55 
     56 #include <arm/cortex/gtmr_var.h>
     57 
     58 #include <arm/fdt/arm_fdtvar.h>
     59 
     60 #define	DEVMAP_ALIGN(a)	((a) & ~L1_S_OFFSET)
     61 #define	DEVMAP_SIZE(s)	roundup2((s), L1_S_SIZE)
     62 #define	DEVMAP_ENTRY(va, pa, sz)			\
     63 	{						\
     64 		.pd_va = DEVMAP_ALIGN(va),		\
     65 		.pd_pa = DEVMAP_ALIGN(pa),		\
     66 		.pd_size = DEVMAP_SIZE(sz),		\
     67 		.pd_prot = VM_PROT_READ|VM_PROT_WRITE,	\
     68 		.pd_cache = PTE_NOCACHE			\
     69 	}
     70 #define	DEVMAP_ENTRY_END	{ 0 }
     71 
     72 static const struct pmap_devmap *
     73 exynos_platform_devmap(void)
     74 {
     75 	static const struct pmap_devmap devmap[] = {
     76 		DEVMAP_ENTRY(EXYNOS_CORE_VBASE,
     77 			     EXYNOS_CORE_PBASE,
     78 			     EXYNOS5_CORE_SIZE),
     79 		DEVMAP_ENTRY(EXYNOS5_AUDIOCORE_VBASE,
     80 			     EXYNOS5_AUDIOCORE_PBASE,
     81 			     EXYNOS5_AUDIOCORE_SIZE),
     82 		DEVMAP_ENTRY_END
     83 	};
     84 
     85 	return devmap;
     86 }
     87 
     88 #define EXYNOS_IOPHYSTOVIRT(a) \
     89     ((vaddr_t)(((a) - EXYNOS_CORE_PBASE) + EXYNOS_CORE_VBASE))
     90 
     91 static void
     92 exynos_platform_bootstrap(void)
     93 {
     94 	paddr_t uart_address = armreg_tpidruro_read();	/* XXX */
     95 	exynos_bootstrap(EXYNOS_CORE_VBASE, EXYNOS_IOPHYSTOVIRT(uart_address));
     96 }
     97 
     98 static void
     99 exynos_platform_init_attach_args(struct fdt_attach_args *faa)
    100 {
    101 	extern struct bus_space armv7_generic_bs_tag;
    102 	extern struct bus_space armv7_generic_a4x_bs_tag;
    103 	extern struct arm32_bus_dma_tag armv7_generic_dma_tag;
    104 
    105 	faa->faa_bst = &armv7_generic_bs_tag;
    106 	faa->faa_a4x_bst = &armv7_generic_a4x_bs_tag;
    107 	faa->faa_dmat = &armv7_generic_dma_tag;
    108 }
    109 
    110 static void
    111 exynos_platform_early_putchar(char c)
    112 {
    113 	extern void exynos_putchar(int);	/* XXX from exynos_start.S */
    114 
    115 	exynos_putchar(c);
    116 }
    117 
    118 static void
    119 exynos_platform_device_register(device_t self, void *aux)
    120 {
    121 	exynos_device_register(self, aux);
    122 }
    123 
    124 static void
    125 exynos_platform_reset(void)
    126 {
    127 	printf("%s: not implemented\n", __func__);
    128 }
    129 
    130 static void
    131 exynos_platform_delay(u_int us)
    132 {
    133 	extern void mct_delay(u_int);
    134 
    135 	mct_delay(us);
    136 }
    137 
    138 static u_int
    139 exynos_platform_uart_freq(void)
    140 {
    141 	return EXYNOS_UART_FREQ;
    142 }
    143 
    144 static const struct arm_platform exynos5_platform = {
    145 	.devmap = exynos_platform_devmap,
    146 	.bootstrap = exynos_platform_bootstrap,
    147 	.init_attach_args = exynos_platform_init_attach_args,
    148 	.early_putchar = exynos_platform_early_putchar,
    149 	.device_register = exynos_platform_device_register,
    150 	.reset = exynos_platform_reset,
    151 	.delay = exynos_platform_delay,
    152 	.uart_freq = exynos_platform_uart_freq,
    153 };
    154 
    155 ARM_PLATFORM(exynos5, "samsung,exynos5", &exynos5_platform);
    156