mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-22 12:14:01 +08:00
721e0205b0
The bcm_kona_smc_init function references the bcm_kona_smc_ids variable that is marked __initconst, so the function itself has to be __init to avoid this build error: WARNING: arch/arm/mach-bcm/built-in.o(.text+0x12c): Section mismatch in reference from the function bcm_kona_smc_init() to the (unknown reference) .init.rodata:(unknown) Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Christian Daudt <csd@broadcom.com>
119 lines
2.9 KiB
C
119 lines
2.9 KiB
C
/*
|
|
* Copyright (C) 2013 Broadcom Corporation
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation version 2.
|
|
*
|
|
* This program is distributed "as is" WITHOUT ANY WARRANTY of any
|
|
* kind, whether express or implied; without even the implied warranty
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <linux/smp.h>
|
|
#include <linux/io.h>
|
|
#include <linux/ioport.h>
|
|
|
|
#include <asm/cacheflush.h>
|
|
#include <linux/of_address.h>
|
|
|
|
#include "bcm_kona_smc.h"
|
|
|
|
struct secure_bridge_data {
|
|
void __iomem *bounce; /* virtual address */
|
|
u32 __iomem buffer_addr; /* physical address */
|
|
int initialized;
|
|
} bridge_data;
|
|
|
|
struct bcm_kona_smc_data {
|
|
unsigned service_id;
|
|
unsigned arg0;
|
|
unsigned arg1;
|
|
unsigned arg2;
|
|
unsigned arg3;
|
|
};
|
|
|
|
static const struct of_device_id bcm_kona_smc_ids[] __initconst = {
|
|
{.compatible = "bcm,kona-smc"},
|
|
{},
|
|
};
|
|
|
|
/* Map in the bounce area */
|
|
void __init bcm_kona_smc_init(void)
|
|
{
|
|
struct device_node *node;
|
|
|
|
/* Read buffer addr and size from the device tree node */
|
|
node = of_find_matching_node(NULL, bcm_kona_smc_ids);
|
|
BUG_ON(!node);
|
|
|
|
/* Don't care about size or flags of the DT node */
|
|
bridge_data.buffer_addr =
|
|
be32_to_cpu(*of_get_address(node, 0, NULL, NULL));
|
|
BUG_ON(!bridge_data.buffer_addr);
|
|
|
|
bridge_data.bounce = of_iomap(node, 0);
|
|
BUG_ON(!bridge_data.bounce);
|
|
|
|
bridge_data.initialized = 1;
|
|
|
|
pr_info("Secure API initialized!\n");
|
|
}
|
|
|
|
/* __bcm_kona_smc() should only run on CPU 0, with pre-emption disabled */
|
|
static void __bcm_kona_smc(void *info)
|
|
{
|
|
struct bcm_kona_smc_data *data = info;
|
|
u32 *args = bridge_data.bounce;
|
|
int rc = 0;
|
|
|
|
/* Must run on CPU 0 */
|
|
BUG_ON(smp_processor_id() != 0);
|
|
|
|
/* Check map in the bounce area */
|
|
BUG_ON(!bridge_data.initialized);
|
|
|
|
/* Copy one 32 bit word into the bounce area */
|
|
args[0] = data->arg0;
|
|
args[1] = data->arg1;
|
|
args[2] = data->arg2;
|
|
args[3] = data->arg3;
|
|
|
|
/* Flush caches for input data passed to Secure Monitor */
|
|
if (data->service_id != SSAPI_BRCM_START_VC_CORE)
|
|
flush_cache_all();
|
|
|
|
/* Trap into Secure Monitor */
|
|
rc = bcm_kona_smc_asm(data->service_id, bridge_data.buffer_addr);
|
|
|
|
if (rc != SEC_ROM_RET_OK)
|
|
pr_err("Secure Monitor call failed (0x%x)!\n", rc);
|
|
}
|
|
|
|
unsigned bcm_kona_smc(unsigned service_id, unsigned arg0, unsigned arg1,
|
|
unsigned arg2, unsigned arg3)
|
|
{
|
|
struct bcm_kona_smc_data data;
|
|
|
|
data.service_id = service_id;
|
|
data.arg0 = arg0;
|
|
data.arg1 = arg1;
|
|
data.arg2 = arg2;
|
|
data.arg3 = arg3;
|
|
|
|
/*
|
|
* Due to a limitation of the secure monitor, we must use the SMP
|
|
* infrastructure to forward all secure monitor calls to Core 0.
|
|
*/
|
|
if (get_cpu() != 0)
|
|
smp_call_function_single(0, __bcm_kona_smc, (void *)&data, 1);
|
|
else
|
|
__bcm_kona_smc(&data);
|
|
|
|
put_cpu();
|
|
|
|
return 0;
|
|
}
|