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/* $NetBSD: arm_platform.c,v 1.7 2023/04/07 08:55:30 skrll Exp $ */
/*-
* Copyright (c) 2020 Jared McNeill <jmcneill@invisible.ca>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* This is the default Arm FDT platform implementation. It assumes the
* following:
*
* - Generic timer
* - PSCI support
* - Console UART is pre-configured by firmware
*/
#include "opt_console.h"
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: arm_platform.c,v 1.7 2023/04/07 08:55:30 skrll Exp $");
#include <sys/param.h>
#include <sys/bus.h>
#include <sys/cpu.h>
#include <sys/device.h>
#include <sys/termios.h>
#include <dev/fdt/fdtvar.h>
#include <uvm/uvm_extern.h>
#include <machine/bootconfig.h>
#include <arm/cpufunc.h>
#include <arm/cortex/gtmr_var.h>
#include <arm/arm/psci.h>
#include <arm/fdt/arm_fdtvar.h>
#include <arm/fdt/psci_fdtvar.h>
#include <evbarm/dev/plcomreg.h>
#include <evbarm/dev/plcomvar.h>
#include <libfdt.h>
#include <arch/evbarm/fdt/platform.h>
extern struct arm32_bus_dma_tag arm_generic_dma_tag;
extern struct bus_space arm_generic_bs_tag;
void plcom_platform_early_putchar(char);
#define ARM_PTOV(p) (((p) - DEVMAP_ALIGN(uart_base)) + KERNEL_IO_VBASE)
void __noasan
plcom_platform_early_putchar(char c)
{
#ifdef CONSADDR
bus_addr_t uart_base = CONSADDR;
volatile uint32_t *uartaddr = cpu_earlydevice_va_p() ?
(volatile uint32_t *)ARM_PTOV(uart_base):
(volatile uint32_t *)uart_base;
while ((le32toh(uartaddr[PL01XCOM_FR / 4]) & PL01X_FR_TXFF) != 0)
continue;
uartaddr[PL01XCOM_DR / 4] = htole32(c);
dsb(sy);
while ((le32toh(uartaddr[PL01XCOM_FR / 4]) & PL01X_FR_TXFE) == 0)
continue;
#endif
}
static void
arm_platform_init_attach_args(struct fdt_attach_args *faa)
{
faa->faa_bst = &arm_generic_bs_tag;
faa->faa_dmat = &arm_generic_dma_tag;
}
static void
arm_platform_device_register(device_t self, void *aux)
{
}
static const struct pmap_devmap *
arm_platform_devmap(void)
{
static const struct pmap_devmap devmap_empty[] = {
DEVMAP_ENTRY_END
};
static struct pmap_devmap devmap_uart[] = {
DEVMAP_ENTRY(KERNEL_IO_VBASE, 0, PAGE_SIZE),
DEVMAP_ENTRY_END
};
const int phandle = fdtbus_get_stdout_phandle();
if (phandle <= 0)
return devmap_empty;
bus_addr_t uart_base;
if (fdtbus_get_reg(phandle, 0, &uart_base, NULL) != 0)
return devmap_empty;
devmap_uart[0].pd_pa = DEVMAP_ALIGN(uart_base);
return devmap_uart;
}
static u_int
arm_platform_uart_freq(void)
{
return 0;
}
static const struct fdt_platform arm_platform = {
.fp_devmap = arm_platform_devmap,
.fp_bootstrap = arm_fdt_cpu_bootstrap,
.fp_init_attach_args = arm_platform_init_attach_args,
.fp_device_register = arm_platform_device_register,
.fp_reset = psci_fdt_reset,
.fp_delay = gtmr_delay,
.fp_uart_freq = arm_platform_uart_freq,
.fp_mpstart = arm_fdt_cpu_mpstart,
};
FDT_PLATFORM(arm, FDT_PLATFORM_DEFAULT, &arm_platform);
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