qemu/hw/arm/msf2-som.c
Markus Armbruster 64eaa82095 hw: Replace trivial drive_get_next() by drive_get()
drive_get_next() is basically a bad idea.  It returns the "next" block
backend of a certain interface type.  "Next" means bus=0,unit=N, where
subsequent calls count N up from zero, per interface type.

This lets you define unit numbers implicitly by execution order.  If the
order changes, or new calls appear "in the middle", unit numbers change.
ABI break.  Hard to spot in review.

A number of machines connect just one backend with drive_get_next().
Change them to use drive_get() directly.  This makes the (zero) unit
number explicit in the code.

Cc: Beniamino Galvani <b.galvani@gmail.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Cc: Subbaraya Sundeep <sundeep.lkml@gmail.com>
Cc: Niek Linnenbank <nieklinnenbank@gmail.com>
Cc: Andrew Baumann <Andrew.Baumann@microsoft.com>
Cc: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
Cc: Jean-Christophe Dubois <jcd@tribudubois.net>
Cc: Alistair Francis <Alistair.Francis@wdc.com>
Cc: Bin Meng <bin.meng@windriver.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Artyom Tarasenko <atar4qemu@gmail.com>
Cc: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
Cc: Michael Tokarev <mjt@tls.msk.ru>
Cc: Laurent Vivier <laurent@vivier.eu>
Cc: qemu-arm@nongnu.org
Cc: qemu-riscv@nongnu.org
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <20211117163409.3587705-3-armbru@redhat.com>
2021-12-15 08:38:16 +01:00

112 lines
4.1 KiB
C

/*
* SmartFusion2 SOM starter kit(from Emcraft) emulation.
*
* Copyright (c) 2017 Subbaraya Sundeep <sundeep.lkml@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "qemu/osdep.h"
#include "qemu/units.h"
#include "qapi/error.h"
#include "qemu/error-report.h"
#include "hw/boards.h"
#include "hw/qdev-properties.h"
#include "hw/arm/boot.h"
#include "hw/qdev-clock.h"
#include "exec/address-spaces.h"
#include "hw/arm/msf2-soc.h"
#define DDR_BASE_ADDRESS 0xA0000000
#define DDR_SIZE (64 * MiB)
#define M2S010_ENVM_SIZE (256 * KiB)
#define M2S010_ESRAM_SIZE (64 * KiB)
static void emcraft_sf2_s2s010_init(MachineState *machine)
{
DeviceState *dev;
DeviceState *spi_flash;
MSF2State *soc;
MachineClass *mc = MACHINE_GET_CLASS(machine);
DriveInfo *dinfo = drive_get(IF_MTD, 0, 0);
qemu_irq cs_line;
BusState *spi_bus;
MemoryRegion *sysmem = get_system_memory();
MemoryRegion *ddr = g_new(MemoryRegion, 1);
Clock *m3clk;
if (strcmp(machine->cpu_type, mc->default_cpu_type) != 0) {
error_report("This board can only be used with CPU %s",
mc->default_cpu_type);
exit(1);
}
memory_region_init_ram(ddr, NULL, "ddr-ram", DDR_SIZE,
&error_fatal);
memory_region_add_subregion(sysmem, DDR_BASE_ADDRESS, ddr);
dev = qdev_new(TYPE_MSF2_SOC);
qdev_prop_set_string(dev, "part-name", "M2S010");
qdev_prop_set_string(dev, "cpu-type", mc->default_cpu_type);
qdev_prop_set_uint64(dev, "eNVM-size", M2S010_ENVM_SIZE);
qdev_prop_set_uint64(dev, "eSRAM-size", M2S010_ESRAM_SIZE);
/*
* CPU clock and peripheral clocks(APB0, APB1)are configurable
* in Libero. CPU clock is divided by APB0 and APB1 divisors for
* peripherals. Emcraft's SoM kit comes with these settings by default.
*/
/* This clock doesn't need migration because it is fixed-frequency */
m3clk = clock_new(OBJECT(machine), "m3clk");
clock_set_hz(m3clk, 142 * 1000000);
qdev_connect_clock_in(dev, "m3clk", m3clk);
qdev_prop_set_uint32(dev, "apb0div", 2);
qdev_prop_set_uint32(dev, "apb1div", 2);
sysbus_realize_and_unref(SYS_BUS_DEVICE(dev), &error_fatal);
soc = MSF2_SOC(dev);
/* Attach SPI flash to SPI0 controller */
spi_bus = qdev_get_child_bus(dev, "spi0");
spi_flash = qdev_new("s25sl12801");
qdev_prop_set_uint8(spi_flash, "spansion-cr2nv", 1);
if (dinfo) {
qdev_prop_set_drive_err(spi_flash, "drive",
blk_by_legacy_dinfo(dinfo), &error_fatal);
}
qdev_realize_and_unref(spi_flash, spi_bus, &error_fatal);
cs_line = qdev_get_gpio_in_named(spi_flash, SSI_GPIO_CS, 0);
sysbus_connect_irq(SYS_BUS_DEVICE(&soc->spi[0]), 1, cs_line);
armv7m_load_kernel(ARM_CPU(first_cpu), machine->kernel_filename,
soc->envm_size);
}
static void emcraft_sf2_machine_init(MachineClass *mc)
{
mc->desc = "SmartFusion2 SOM kit from Emcraft (M2S010)";
mc->init = emcraft_sf2_s2s010_init;
mc->default_cpu_type = ARM_CPU_TYPE_NAME("cortex-m3");
}
DEFINE_MACHINE("emcraft-sf2", emcraft_sf2_machine_init)