zynq_platform.c revision 1.6 
1/*	$NetBSD: zynq_platform.c,v 1.6 2022/10/25 22:59:10 jmcneill 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 1.6 2022/10/25 22:59:10 jmcneill 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 arm32_bus_dma_tag arm_generic_dma_tag;
80
81void zynq_platform_early_putchar(char);
82
83static const struct pmap_devmap *
84zynq_platform_devmap(void)
85{
86	static const struct pmap_devmap devmap[] = {
87		DEVMAP_ENTRY(ZYNQ_IOREG_VBASE,
88			     ZYNQ_IOREG_PBASE,
89			     ZYNQ_IOREG_SIZE),
90		DEVMAP_ENTRY(ZYNQ_GPV_VBASE,
91			     ZYNQ_GPV_PBASE,
92			     ZYNQ_GPV_SIZE),
93		DEVMAP_ENTRY(ZYNQ_ARMCORE_VBASE,
94			     ZYNQ_ARMCORE_PBASE,
95			     ZYNQ_ARMCORE_SIZE),
96		DEVMAP_ENTRY_END
97	};
98
99	return devmap;
100}
101
102static void
103zynq_platform_init_attach_args(struct fdt_attach_args *faa)
104{
105	faa->faa_bst = &arm_generic_bs_tag;
106	faa->faa_dmat = &arm_generic_dma_tag;
107}
108
109void __noasan
110zynq_platform_early_putchar(char c)
111{
112#ifdef CONSADDR
113#define CONSADDR_VA     ((CONSADDR - ZYNQ_IOREG_PBASE) + ZYNQ_IOREG_VBASE)
114	volatile uint32_t *uartaddr = cpu_earlydevice_va_p() ?
115	    (volatile uint32_t *)CONSADDR_VA :
116	    (volatile uint32_t *)CONSADDR;
117
118	/* QEMU needs CR_TXEN to be set and CR_TXDIS to be unset */
119	uartaddr[UART_CONTROL / 4] = CR_TXEN;
120	while ((le32toh(uartaddr[UART_CHNL_INT_STS / 4]) & STS_TEMPTY) == 0)
121		;
122
123	uartaddr[UART_TX_RX_FIFO / 4] = htole32(c);
124#endif
125}
126
127static void
128zynq_platform_device_register(device_t dev, void *aux)
129{
130}
131
132static u_int
133zynq_platform_uart_freq(void)
134{
135	return ZYNQ_REF_FREQ;
136}
137
138#define ZYNQ_ARMCORE_L2C_BASE	0x00002000
139#define ZYNQ_ARM_PL310_BASE	ZYNQ_ARMCORE_VBASE + ZYNQ_ARMCORE_L2C_BASE
140
141static void
142zynq_platform_bootstrap(void)
143{
144#if NARML2CC > 0
145	const bus_space_handle_t pl310_bh = ZYNQ_ARM_PL310_BASE;
146	arml2cc_init(&arm_generic_bs_tag, pl310_bh, 0);
147#endif
148
149	arm_fdt_cpu_bootstrap();
150
151	void *fdt_data = __UNCONST(fdtbus_get_data());
152	const int chosen_off = fdt_path_offset(fdt_data, "/chosen");
153	if (chosen_off < 0)
154		return;
155
156	if (match_bootconf_option(boot_args, "console", "fb")) {
157		const int framebuffer_off =
158		    fdt_path_offset(fdt_data, "/chosen/framebuffer");
159		if (framebuffer_off >= 0) {
160			const char *status = fdt_getprop(fdt_data,
161			    framebuffer_off, "status", NULL);
162			if (status == NULL || strncmp(status, "ok", 2) == 0) {
163				fdt_setprop_string(fdt_data, chosen_off,
164				    "stdout-path", "/chosen/framebuffer");
165			}
166		}
167	} else if (match_bootconf_option(boot_args, "console", "serial")) {
168		fdt_setprop_string(fdt_data, chosen_off,
169		    "stdout-path", "serial0:115200n8");
170	}
171}
172
173static void
174zynq_platform_reset(void)
175{
176
177}
178
179static const struct arm_platform zynq_platform = {
180	.ap_devmap = zynq_platform_devmap,
181	.ap_bootstrap = zynq_platform_bootstrap,
182	.ap_init_attach_args = zynq_platform_init_attach_args,
183	.ap_device_register = zynq_platform_device_register,
184	.ap_reset = zynq_platform_reset,
185	.ap_delay = a9tmr_delay,
186	.ap_uart_freq = zynq_platform_uart_freq,
187#if 0
188	.ap_mpstart = arm_fdt_cpu_mpstart,
189#endif
190};
191
192
193ARM_PLATFORM(zynq, "xlnx,zynq-7000", &zynq_platform);
194