mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-29 22:43:10 +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>
80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Actions Semi Owl SoCs platform support.
|
|
*
|
|
* Copyright (C) 2018 Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
|
|
*/
|
|
|
|
#include <cpu_func.h>
|
|
#include <init.h>
|
|
#include <asm/cache.h>
|
|
#include <asm/global_data.h>
|
|
#include <linux/arm-smccc.h>
|
|
#include <linux/psci.h>
|
|
#include <common.h>
|
|
#include <asm/io.h>
|
|
#include <asm/mach-types.h>
|
|
#include <asm/psci.h>
|
|
|
|
#define DMM_INTERLEAVE_PER_CH_CFG 0xe0290028
|
|
|
|
DECLARE_GLOBAL_DATA_PTR;
|
|
|
|
unsigned int owl_get_ddrcap(void)
|
|
{
|
|
unsigned int val, cap;
|
|
|
|
/* ddr capacity register initialized by ddr driver
|
|
* in early bootloader
|
|
*/
|
|
#if defined(CONFIG_MACH_S700)
|
|
val = (readl(DMM_INTERLEAVE_PER_CH_CFG) >> 8) & 0x7;
|
|
cap = (val + 1) * 256;
|
|
#elif defined(CONFIG_MACH_S900)
|
|
val = (readl(DMM_INTERLEAVE_PER_CH_CFG) >> 8) & 0xf;
|
|
cap = 64 * (1 << val);
|
|
#endif
|
|
|
|
return cap;
|
|
}
|
|
|
|
/*
|
|
* dram_init - sets uboots idea of sdram size
|
|
*/
|
|
int dram_init(void)
|
|
{
|
|
gd->ram_size = owl_get_ddrcap() * 1024 * 1024;
|
|
return 0;
|
|
}
|
|
|
|
/* This is called after dram_init() so use get_ram_size result */
|
|
int dram_init_banksize(void)
|
|
{
|
|
gd->bd->bi_dram[0].start = CONFIG_SYS_SDRAM_BASE;
|
|
gd->bd->bi_dram[0].size = gd->ram_size;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void show_psci_version(void)
|
|
{
|
|
struct arm_smccc_res res;
|
|
|
|
arm_smccc_smc(ARM_PSCI_0_2_FN_PSCI_VERSION, 0, 0, 0, 0, 0, 0, 0, &res);
|
|
|
|
printf("PSCI: v%ld.%ld\n",
|
|
PSCI_VERSION_MAJOR(res.a0),
|
|
PSCI_VERSION_MINOR(res.a0));
|
|
}
|
|
|
|
int board_init(void)
|
|
{
|
|
show_psci_version();
|
|
|
|
return 0;
|
|
}
|
|
|
|
void reset_cpu(void)
|
|
{
|
|
psci_system_reset();
|
|
}
|