zynq_platform.c revision 1.2 
1/*	$NetBSD: zynq_platform.c,v 1.2 2020/07/10 12:25:10 skrll Exp $	*/
2
3/*-
4 * Copyright (c) 2019 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Nick Hudson
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 *    notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 *    notice, this list of conditions and the following disclaimer in the
17 *    documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32#include "opt_console.h"
33#include "opt_soc.h"
34
35#include "arml2cc.h"
36
37#include <sys/cdefs.h>
38__KERNEL_RCSID(0, "$NetBSD: zynq_platform.c,v 1.2 2020/07/10 12:25:10 skrll Exp $");
39
40#include <sys/param.h>
41#include <sys/bus.h>
42#include <sys/cpu.h>
43#include <sys/device.h>
44
45#include <dev/fdt/fdtvar.h>
46#include <arm/fdt/arm_fdtvar.h>
47
48#include <uvm/uvm_extern.h>
49
50#include <machine/bootconfig.h>
51
52#include <arm/cortex/a9tmr_var.h>
53#include <arm/xilinx/zynq_uartreg.h>
54
55#include <evbarm/fdt/platform.h>
56
57#include <libfdt.h>
58
59#include <arm/cortex/pl310_var.h>
60
61#define	ZYNQ_REF_FREQ	24000000
62
63#define	ZYNQ7000_DDR_PBASE	0x00000000
64#define	ZYNQ7000_DDR_SIZE	0x40000000
65
66#define	ZYNQ_IOREG_VBASE	KERNEL_IO_VBASE
67#define	ZYNQ_IOREG_PBASE	0xe0000000
68#define ZYNQ_IOREG_SIZE		0x00200000
69
70#define ZYNQ_GPV_VBASE		(ZYNQ_IOREG_VBASE + ZYNQ_IOREG_SIZE)
71#define ZYNQ_GPV_PBASE		0xf8900000
72#define ZYNQ_GPV_SIZE		0x00100000
73
74#define ZYNQ_ARMCORE_VBASE	(ZYNQ_GPV_VBASE + ZYNQ_GPV_SIZE)
75#define ZYNQ_ARMCORE_PBASE	0xf8f00000
76#define ZYNQ_ARMCORE_SIZE	0x00003000
77
78extern struct bus_space arm_generic_bs_tag;
79extern struct bus_space arm_generic_a4x_bs_tag;
80extern struct arm32_bus_dma_tag arm_generic_dma_tag;
81
82void zynq_platform_early_putchar(char);
83
84static const struct pmap_devmap *
85zynq_platform_devmap(void)
86{
87	static const struct pmap_devmap devmap[] = {
88		DEVMAP_ENTRY(ZYNQ_IOREG_VBASE,
89			     ZYNQ_IOREG_PBASE,
90			     ZYNQ_IOREG_SIZE),
91		DEVMAP_ENTRY(ZYNQ_GPV_VBASE,
92			     ZYNQ_GPV_PBASE,
93			     ZYNQ_GPV_SIZE),
94		DEVMAP_ENTRY(ZYNQ_ARMCORE_VBASE,
95			     ZYNQ_ARMCORE_PBASE,
96			     ZYNQ_ARMCORE_SIZE),
97		DEVMAP_ENTRY_END
98	};
99
100	return devmap;
101}
102
103static void
104zynq_platform_init_attach_args(struct fdt_attach_args *faa)
105{
106	faa->faa_bst = &arm_generic_bs_tag;
107	faa->faa_a4x_bst = &arm_generic_a4x_bs_tag;
108	faa->faa_dmat = &arm_generic_dma_tag;
109}
110
111void __noasan
112zynq_platform_early_putchar(char c)
113{
114#ifdef CONSADDR
115#define CONSADDR_VA     ((CONSADDR - ZYNQ_IOREG_PBASE) + ZYNQ_IOREG_VBASE)
116	volatile uint32_t *uartaddr = cpu_earlydevice_va_p() ?
117	    (volatile uint32_t *)CONSADDR_VA :
118	    (volatile uint32_t *)CONSADDR;
119
120	/* QEMU needs CR_TXEN to be set and CR_TXDIS to be unset */
121	uartaddr[UART_CONTROL / 4] = CR_TXEN;
122	while ((le32toh(uartaddr[UART_CHNL_INT_STS / 4]) & STS_TEMPTY) == 0)
123		;
124
125	uartaddr[UART_TX_RX_FIFO / 4] = htole32(c);
126#endif
127}
128
129static void
130zynq_platform_device_register(device_t dev, void *aux)
131{
132	prop_dictionary_t dict = device_properties(dev);
133
134	if (device_is_a(dev, "arma9tmr")) {
135		prop_dictionary_set_uint32(dict, "frequency",
136			ZYNQ_REF_FREQ / 4);
137	}
138}
139
140static u_int
141zynq_platform_uart_freq(void)
142{
143	return ZYNQ_REF_FREQ;
144}
145
146#define ZYNQ_ARMCORE_L2C_BASE	0x00002000
147#define ZYNQ_ARM_PL310_BASE	ZYNQ_ARMCORE_VBASE + ZYNQ_ARMCORE_L2C_BASE
148
149static void
150zynq_platform_bootstrap(void)
151{
152#if NARML2CC > 0
153	const bus_space_handle_t pl310_bh = ZYNQ_ARM_PL310_BASE;
154	arml2cc_init(&arm_generic_bs_tag, pl310_bh, 0);
155#endif
156
157	arm_fdt_cpu_bootstrap();
158
159	void *fdt_data = __UNCONST(fdtbus_get_data());
160	const int chosen_off = fdt_path_offset(fdt_data, "/chosen");
161	if (chosen_off < 0)
162		return;
163
164	if (match_bootconf_option(boot_args, "console", "fb")) {
165		const int framebuffer_off =
166		    fdt_path_offset(fdt_data, "/chosen/framebuffer");
167		if (framebuffer_off >= 0) {
168			const char *status = fdt_getprop(fdt_data,
169			    framebuffer_off, "status", NULL);
170			if (status == NULL || strncmp(status, "ok", 2) == 0) {
171				fdt_setprop_string(fdt_data, chosen_off,
172				    "stdout-path", "/chosen/framebuffer");
173			}
174		}
175	} else if (match_bootconf_option(boot_args, "console", "serial")) {
176		fdt_setprop_string(fdt_data, chosen_off,
177		    "stdout-path", "serial0:115200n8");
178	}
179}
180
181static void
182zynq_platform_reset(void)
183{
184
185}
186
187static const struct arm_platform zynq_platform = {
188	.ap_devmap = zynq_platform_devmap,
189	.ap_bootstrap = zynq_platform_bootstrap,
190	.ap_init_attach_args = zynq_platform_init_attach_args,
191	.ap_device_register = zynq_platform_device_register,
192	.ap_reset = zynq_platform_reset,
193	.ap_delay = a9tmr_delay,
194	.ap_uart_freq = zynq_platform_uart_freq,
195#if 0
196	.ap_mpstart = arm_fdt_cpu_mpstart,
197#endif
198};
199
200
201ARM_PLATFORM(zynq, "xlnx,zynq-7000", &zynq_platform);
202