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/*
* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of ARM nor the names of its contributors may be used
* to endorse or promote products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <assert.h>
#include <arch_helpers.h>
#include "debug.h"
#include <platform.h>
#include <xlat_tables.h>
/*******************************************************************************
* This array holds the characteristics of the differences between the three
* FVP platforms (Base, A53_A57 & Foundation). It will be populated during cold
* boot at each boot stage by the primary before enabling the MMU (to allow cci
* configuration) & used thereafter. Each BL will have its own copy to allow
* independent operation.
******************************************************************************/
static unsigned long platform_config[CONFIG_LIMIT];
/*******************************************************************************
* Enable the MMU assuming that the pagetables have already been created
*******************************************************************************/
void enable_mmu()
{
unsigned long mair, tcr, ttbr, sctlr;
unsigned long current_el = read_current_el();
/* Set the attributes in the right indices of the MAIR */
mair = MAIR_ATTR_SET(ATTR_DEVICE, ATTR_DEVICE_INDEX);
mair |= MAIR_ATTR_SET(ATTR_IWBWA_OWBWA_NTR,
ATTR_IWBWA_OWBWA_NTR_INDEX);
/*
* Set TCR bits as well. Inner & outer WBWA & shareable + T0SZ = 32
*/
tcr = TCR_SH_INNER_SHAREABLE | TCR_RGN_OUTER_WBA |
TCR_RGN_INNER_WBA | TCR_T0SZ_4GB;
/* Set TTBR bits as well */
ttbr = (unsigned long) l1_xlation_table;
if (GET_EL(current_el) == MODE_EL3) {
write_mair_el3(mair);
tcr |= TCR_EL3_RES1;
/* Invalidate EL3 TLBs */
tlbialle3();
write_tcr_el3(tcr);
write_ttbr0_el3(ttbr);
sctlr = read_sctlr_el3();
sctlr |= SCTLR_WXN_BIT | SCTLR_M_BIT | SCTLR_I_BIT;
sctlr |= SCTLR_A_BIT | SCTLR_C_BIT;
write_sctlr_el3(sctlr);
} else {
write_mair_el1(mair);
/* Invalidate EL1 TLBs */
tlbivmalle1();
write_tcr_el1(tcr);
write_ttbr0_el1(ttbr);
sctlr = read_sctlr_el1();
sctlr |= SCTLR_WXN_BIT | SCTLR_M_BIT | SCTLR_I_BIT;
sctlr |= SCTLR_A_BIT | SCTLR_C_BIT;
write_sctlr_el1(sctlr);
}
return;
}
void disable_mmu(void)
{
unsigned long sctlr;
unsigned long current_el = read_current_el();
if (GET_EL(current_el) == MODE_EL3) {
sctlr = read_sctlr_el3();
sctlr = sctlr & ~(SCTLR_M_BIT | SCTLR_C_BIT);
write_sctlr_el3(sctlr);
} else {
sctlr = read_sctlr_el1();
sctlr = sctlr & ~(SCTLR_M_BIT | SCTLR_C_BIT);
write_sctlr_el1(sctlr);
}
/* Flush the caches */
dcsw_op_all(DCCISW);
return;
}
/*
* Table of regions to map using the MMU.
* This doesn't include TZRAM as the 'mem_layout' argument passed to to
* configure_mmu() will give the available subset of that,
*/
const mmap_region fvp_mmap[] = {
{ TZROM_BASE, TZROM_SIZE, MT_MEMORY | MT_RO | MT_SECURE },
{ TZDRAM_BASE, TZDRAM_SIZE, MT_MEMORY | MT_RW | MT_SECURE },
{ FLASH0_BASE, FLASH0_SIZE, MT_MEMORY | MT_RO | MT_SECURE },
{ FLASH1_BASE, FLASH1_SIZE, MT_MEMORY | MT_RO | MT_SECURE },
{ VRAM_BASE, VRAM_SIZE, MT_MEMORY | MT_RW | MT_SECURE },
{ DEVICE0_BASE, DEVICE0_SIZE, MT_DEVICE | MT_RW | MT_SECURE },
{ NSRAM_BASE, NSRAM_SIZE, MT_MEMORY | MT_RW | MT_NS },
{ DEVICE1_BASE, DEVICE1_SIZE, MT_DEVICE | MT_RW | MT_SECURE },
/* 2nd GB as device for now...*/
{ 0x40000000, 0x40000000, MT_DEVICE | MT_RW | MT_SECURE },
{ DRAM_BASE, DRAM_SIZE, MT_MEMORY | MT_RW | MT_NS },
{0}
};
/*******************************************************************************
* Setup the pagetables as per the platform memory map & initialize the mmu
*******************************************************************************/
void configure_mmu(meminfo *mem_layout,
unsigned long ro_start,
unsigned long ro_limit,
unsigned long coh_start,
unsigned long coh_limit)
{
mmap_add_region(mem_layout->total_base, mem_layout->total_size,
MT_MEMORY | MT_RW | MT_SECURE);
mmap_add_region(ro_start, ro_limit - ro_start,
MT_MEMORY | MT_RO | MT_SECURE);
mmap_add_region(coh_start, coh_limit - coh_start,
MT_DEVICE | MT_RW | MT_SECURE);
mmap_add(fvp_mmap);
init_xlat_tables();
enable_mmu();
return;
}
/* Simple routine which returns a configuration variable value */
unsigned long platform_get_cfgvar(unsigned int var_id)
{
assert(var_id < CONFIG_LIMIT);
return platform_config[var_id];
}
/*******************************************************************************
* A single boot loader stack is expected to work on both the Foundation FVP
* models and the two flavours of the Base FVP models (AEMv8 & Cortex). The
* SYS_ID register provides a mechanism for detecting the differences between
* these platforms. This information is stored in a per-BL array to allow the
* code to take the correct path.Per BL platform configuration.
******************************************************************************/
int platform_config_setup(void)
{
unsigned int rev, hbi, bld, arch, sys_id, midr_pn;
sys_id = mmio_read_32(VE_SYSREGS_BASE + V2M_SYS_ID);
rev = (sys_id >> SYS_ID_REV_SHIFT) & SYS_ID_REV_MASK;
hbi = (sys_id >> SYS_ID_HBI_SHIFT) & SYS_ID_HBI_MASK;
bld = (sys_id >> SYS_ID_BLD_SHIFT) & SYS_ID_BLD_MASK;
arch = (sys_id >> SYS_ID_ARCH_SHIFT) & SYS_ID_ARCH_MASK;
if ((rev != REV_FVP) || (arch != ARCH_MODEL))
panic();
/*
* The build field in the SYS_ID tells which variant of the GIC
* memory is implemented by the model.
*/
switch (bld) {
case BLD_GIC_VE_MMAP:
platform_config[CONFIG_GICD_ADDR] = VE_GICD_BASE;
platform_config[CONFIG_GICC_ADDR] = VE_GICC_BASE;
platform_config[CONFIG_GICH_ADDR] = VE_GICH_BASE;
platform_config[CONFIG_GICV_ADDR] = VE_GICV_BASE;
break;
case BLD_GIC_A53A57_MMAP:
platform_config[CONFIG_GICD_ADDR] = BASE_GICD_BASE;
platform_config[CONFIG_GICC_ADDR] = BASE_GICC_BASE;
platform_config[CONFIG_GICH_ADDR] = BASE_GICH_BASE;
platform_config[CONFIG_GICV_ADDR] = BASE_GICV_BASE;
break;
default:
assert(0);
}
/*
* The hbi field in the SYS_ID is 0x020 for the Base FVP & 0x010
* for the Foundation FVP.
*/
switch (hbi) {
case HBI_FOUNDATION:
platform_config[CONFIG_MAX_AFF0] = 4;
platform_config[CONFIG_MAX_AFF1] = 1;
platform_config[CONFIG_CPU_SETUP] = 0;
platform_config[CONFIG_BASE_MMAP] = 0;
platform_config[CONFIG_HAS_CCI] = 0;
platform_config[CONFIG_HAS_TZC] = 0;
break;
case HBI_FVP_BASE:
midr_pn = (read_midr() >> MIDR_PN_SHIFT) & MIDR_PN_MASK;
if ((midr_pn == MIDR_PN_A57) || (midr_pn == MIDR_PN_A53))
platform_config[CONFIG_CPU_SETUP] = 1;
else
platform_config[CONFIG_CPU_SETUP] = 0;
platform_config[CONFIG_MAX_AFF0] = 4;
platform_config[CONFIG_MAX_AFF1] = 2;
platform_config[CONFIG_BASE_MMAP] = 1;
platform_config[CONFIG_HAS_CCI] = 1;
platform_config[CONFIG_HAS_TZC] = 1;
break;
default:
assert(0);
}
return 0;
}
unsigned long plat_get_ns_image_entrypoint(void)
{
return NS_IMAGE_OFFSET;
}
uint64_t plat_get_syscnt_freq(void)
{
uint64_t counter_base_frequency;
/* Read the frequency from Frequency modes table */
counter_base_frequency = mmio_read_32(SYS_CNTCTL_BASE + CNTFID_OFF);
/* The first entry of the frequency modes table must not be 0 */
assert(counter_base_frequency != 0);
return counter_base_frequency;
}
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