mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-18 01:03:05 +00:00
35b65dd8ef
Historically, the reset_cpu() function had an `addr` parameter which was
meant to pass in an address of the reset vector location, where the CPU
should reset to. This feature is no longer used anywhere in U-Boot as
all reset_cpu() implementations now ignore the passed value. Generic
code has been added which always calls reset_cpu() with `0` which means
this feature can no longer be used easily anyway.
Over time, many implementations seem to have "misunderstood" the
existence of this parameter as a way to customize/parameterize the reset
(e.g. COLD vs WARM resets). As this is not properly supported, the
code will almost always not do what it is intended to (because all
call-sites just call reset_cpu() with 0).
To avoid confusion and to clean up the codebase from unused left-overs
of the past, remove the `addr` parameter entirely. Code which intends
to support different kinds of resets should be rewritten as a sysreset
driver instead.
This transformation was done with the following coccinelle patch:
@@
expression argvalue;
@@
- reset_cpu(argvalue)
+ reset_cpu()
@@
identifier argname;
type argtype;
@@
- reset_cpu(argtype argname)
+ reset_cpu(void)
{ ... }
Signed-off-by: Harald Seiler <hws@denx.de>
Reviewed-by: Simon Glass <sjg@chromium.org>
145 lines
2.9 KiB
C
145 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2012 Michal Simek <monstr@monstr.eu>
|
|
* Copyright (C) 2012 Xilinx, Inc. All rights reserved.
|
|
*/
|
|
#include <common.h>
|
|
#include <cpu_func.h>
|
|
#include <init.h>
|
|
#include <zynqpl.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/io.h>
|
|
#include <asm/arch/clk.h>
|
|
#include <asm/arch/hardware.h>
|
|
#include <asm/arch/ps7_init_gpl.h>
|
|
#include <asm/arch/sys_proto.h>
|
|
|
|
#define ZYNQ_SILICON_VER_MASK 0xF0000000
|
|
#define ZYNQ_SILICON_VER_SHIFT 28
|
|
|
|
#if CONFIG_IS_ENABLED(FPGA)
|
|
xilinx_desc fpga = {
|
|
.family = xilinx_zynq,
|
|
.iface = devcfg,
|
|
.operations = &zynq_op,
|
|
};
|
|
#endif
|
|
|
|
static const struct {
|
|
u8 idcode;
|
|
#if defined(CONFIG_FPGA)
|
|
u32 fpga_size;
|
|
#endif
|
|
char *devicename;
|
|
} zynq_fpga_descs[] = {
|
|
ZYNQ_DESC(7Z007S),
|
|
ZYNQ_DESC(7Z010),
|
|
ZYNQ_DESC(7Z012S),
|
|
ZYNQ_DESC(7Z014S),
|
|
ZYNQ_DESC(7Z015),
|
|
ZYNQ_DESC(7Z020),
|
|
ZYNQ_DESC(7Z030),
|
|
ZYNQ_DESC(7Z035),
|
|
ZYNQ_DESC(7Z045),
|
|
ZYNQ_DESC(7Z100),
|
|
{ /* Sentinel */ },
|
|
};
|
|
|
|
int arch_cpu_init(void)
|
|
{
|
|
zynq_slcr_unlock();
|
|
#ifndef CONFIG_SPL_BUILD
|
|
/* Device config APB, unlock the PCAP */
|
|
writel(0x757BDF0D, &devcfg_base->unlock);
|
|
writel(0xFFFFFFFF, &devcfg_base->rom_shadow);
|
|
|
|
#if (CONFIG_SYS_SDRAM_BASE == 0)
|
|
/* remap DDR to zero, FILTERSTART */
|
|
writel(0, &scu_base->filter_start);
|
|
|
|
/* OCM_CFG, Mask out the ROM, map ram into upper addresses */
|
|
writel(0x1F, &slcr_base->ocm_cfg);
|
|
/* FPGA_RST_CTRL, clear resets on AXI fabric ports */
|
|
writel(0x0, &slcr_base->fpga_rst_ctrl);
|
|
/* Set urgent bits with register */
|
|
writel(0x0, &slcr_base->ddr_urgent_sel);
|
|
/* Urgent write, ports S2/S3 */
|
|
writel(0xC, &slcr_base->ddr_urgent);
|
|
#endif
|
|
#endif
|
|
zynq_slcr_lock();
|
|
|
|
return 0;
|
|
}
|
|
|
|
unsigned int zynq_get_silicon_version(void)
|
|
{
|
|
return (readl(&devcfg_base->mctrl) & ZYNQ_SILICON_VER_MASK)
|
|
>> ZYNQ_SILICON_VER_SHIFT;
|
|
}
|
|
|
|
void reset_cpu(void)
|
|
{
|
|
zynq_slcr_cpu_reset();
|
|
while (1)
|
|
;
|
|
}
|
|
|
|
#if !CONFIG_IS_ENABLED(SYS_DCACHE_OFF)
|
|
void enable_caches(void)
|
|
{
|
|
/* Enable D-cache. I-cache is already enabled in start.S */
|
|
dcache_enable();
|
|
}
|
|
#endif
|
|
|
|
static int __maybe_unused cpu_desc_id(void)
|
|
{
|
|
u32 idcode;
|
|
u8 i;
|
|
|
|
idcode = zynq_slcr_get_idcode();
|
|
for (i = 0; zynq_fpga_descs[i].idcode; i++) {
|
|
if (zynq_fpga_descs[i].idcode == idcode)
|
|
return i;
|
|
}
|
|
|
|
return -ENODEV;
|
|
}
|
|
|
|
#if defined(CONFIG_ARCH_EARLY_INIT_R)
|
|
int arch_early_init_r(void)
|
|
{
|
|
#if CONFIG_IS_ENABLED(FPGA)
|
|
int cpu_id = cpu_desc_id();
|
|
|
|
if (cpu_id < 0)
|
|
return 0;
|
|
|
|
fpga.size = zynq_fpga_descs[cpu_id].fpga_size;
|
|
fpga.name = zynq_fpga_descs[cpu_id].devicename;
|
|
fpga_init();
|
|
fpga_add(fpga_xilinx, &fpga);
|
|
#endif
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
#ifdef CONFIG_DISPLAY_CPUINFO
|
|
int print_cpuinfo(void)
|
|
{
|
|
u32 version;
|
|
int cpu_id = cpu_desc_id();
|
|
|
|
if (cpu_id < 0)
|
|
return 0;
|
|
|
|
version = zynq_get_silicon_version() << 1;
|
|
if (version > (PCW_SILICON_VERSION_3 << 1))
|
|
version += 1;
|
|
|
|
printf("CPU: Zynq %s\n", zynq_fpga_descs[cpu_id].devicename);
|
|
printf("Silicon: v%d.%d\n", version >> 1, version & 1);
|
|
return 0;
|
|
}
|
|
#endif
|