mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-25 12:04:46 +08:00
844b85dda2
clang warns about an impossible condition when building with 32-bit
phys_addr_t:
arch/arm/mach-keystone/keystone.c:79:16: error: result of comparison of constant 51539607551 with expression of type 'phys_addr_t' (aka 'unsigned int') is always false [-Werror,-Wtautological-constant-out-of-range-compare]
mem_end > KEYSTONE_HIGH_PHYS_END) {
~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~
arch/arm/mach-keystone/keystone.c:78:16: error: result of comparison of constant 34359738368 with expression of type 'phys_addr_t' (aka 'unsigned int') is always true [-Werror,-Wtautological-constant-out-of-range-compare]
if (mem_start < KEYSTONE_HIGH_PHYS_START ||
~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~
Change the temporary variable to a fixed-size u64 to avoid the warning.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
Link: https://lore.kernel.org/r/20210323131814.2751750-1-arnd@kernel.org'
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Keystone2 based boards and SOC related code.
|
|
*
|
|
* Copyright 2013 Texas Instruments, Inc.
|
|
* Cyril Chemparathy <cyril@ti.com>
|
|
* Santosh Shilimkar <santosh.shillimkar@ti.com>
|
|
*/
|
|
#include <linux/io.h>
|
|
#include <linux/of.h>
|
|
#include <linux/dma-map-ops.h>
|
|
#include <linux/init.h>
|
|
#include <linux/of_platform.h>
|
|
#include <linux/of_address.h>
|
|
#include <linux/memblock.h>
|
|
|
|
#include <asm/setup.h>
|
|
#include <asm/mach/map.h>
|
|
#include <asm/mach/arch.h>
|
|
#include <asm/mach/time.h>
|
|
#include <asm/smp_plat.h>
|
|
#include <asm/memory.h>
|
|
|
|
#include "memory.h"
|
|
|
|
#include "keystone.h"
|
|
|
|
#ifdef CONFIG_ARM_LPAE
|
|
static int keystone_platform_notifier(struct notifier_block *nb,
|
|
unsigned long event, void *data)
|
|
{
|
|
struct device *dev = data;
|
|
|
|
if (event != BUS_NOTIFY_ADD_DEVICE)
|
|
return NOTIFY_DONE;
|
|
|
|
if (!dev)
|
|
return NOTIFY_BAD;
|
|
|
|
if (!dev->of_node) {
|
|
int ret = dma_direct_set_offset(dev, KEYSTONE_HIGH_PHYS_START,
|
|
KEYSTONE_LOW_PHYS_START,
|
|
KEYSTONE_HIGH_PHYS_SIZE);
|
|
dev_err(dev, "set dma_offset%08llx%s\n",
|
|
KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START,
|
|
ret ? " failed" : "");
|
|
}
|
|
return NOTIFY_OK;
|
|
}
|
|
|
|
static struct notifier_block platform_nb = {
|
|
.notifier_call = keystone_platform_notifier,
|
|
};
|
|
#endif /* CONFIG_ARM_LPAE */
|
|
|
|
static void __init keystone_init(void)
|
|
{
|
|
#ifdef CONFIG_ARM_LPAE
|
|
if (PHYS_OFFSET >= KEYSTONE_HIGH_PHYS_START)
|
|
bus_register_notifier(&platform_bus_type, &platform_nb);
|
|
#endif
|
|
keystone_pm_runtime_init();
|
|
}
|
|
|
|
static long long __init keystone_pv_fixup(void)
|
|
{
|
|
long long offset;
|
|
u64 mem_start, mem_end;
|
|
|
|
mem_start = memblock_start_of_DRAM();
|
|
mem_end = memblock_end_of_DRAM();
|
|
|
|
/* nothing to do if we are running out of the <32-bit space */
|
|
if (mem_start >= KEYSTONE_LOW_PHYS_START &&
|
|
mem_end <= KEYSTONE_LOW_PHYS_END)
|
|
return 0;
|
|
|
|
if (mem_start < KEYSTONE_HIGH_PHYS_START ||
|
|
mem_end > KEYSTONE_HIGH_PHYS_END) {
|
|
pr_crit("Invalid address space for memory (%08llx-%08llx)\n",
|
|
mem_start, mem_end);
|
|
return 0;
|
|
}
|
|
|
|
offset = KEYSTONE_HIGH_PHYS_START - KEYSTONE_LOW_PHYS_START;
|
|
|
|
/* Populate the arch idmap hook */
|
|
arch_phys_to_idmap_offset = -offset;
|
|
|
|
return offset;
|
|
}
|
|
|
|
static const char *const keystone_match[] __initconst = {
|
|
"ti,k2hk",
|
|
"ti,k2e",
|
|
"ti,k2l",
|
|
"ti,k2g",
|
|
"ti,keystone",
|
|
NULL,
|
|
};
|
|
|
|
DT_MACHINE_START(KEYSTONE, "Keystone")
|
|
#if defined(CONFIG_ZONE_DMA) && defined(CONFIG_ARM_LPAE)
|
|
.dma_zone_size = SZ_2G,
|
|
#endif
|
|
.smp = smp_ops(keystone_smp_ops),
|
|
.init_machine = keystone_init,
|
|
.dt_compat = keystone_match,
|
|
.pv_fixup = keystone_pv_fixup,
|
|
MACHINE_END
|