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https://github.com/AsahiLinux/u-boot
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980d6a5511
Until now we've been using memory beyond psci_text_end as stack space
for the secure monitor or PSCI implementation, even if space was not
allocated for it.
This was partially fixed in ("ARM: allocate extra space for PSCI stack
in secure section during link phase"). However, calculating stack space
from psci_text_end in one place, while allocating the space in another
is error prone.
This patch adds a separate empty secure stack section, with space for
CONFIG_ARMV7_PSCI_NR_CPUS stacks, each 1 KB. There's also
__secure_stack_start and __secure_stack_end symbols. The linker script
handles calculating the correct VMAs for the stack section. For
platforms that relocate/copy the secure monitor before using it, the
space is not allocated in the executable, saving space.
For platforms that do not define CONFIG_ARMV7_PSCI_NR_CPUS, a whole page
of stack space for 4 CPUs is allocated, matching the previous behavior.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
141 lines
3.8 KiB
C
141 lines
3.8 KiB
C
/*
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* (C) Copyright 2010
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* Texas Instruments, <www.ti.com>
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* Aneesh V <aneesh@ti.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef ARMV7_H
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#define ARMV7_H
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/* Cortex-A9 revisions */
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#define MIDR_CORTEX_A9_R0P1 0x410FC091
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#define MIDR_CORTEX_A9_R1P2 0x411FC092
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#define MIDR_CORTEX_A9_R1P3 0x411FC093
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#define MIDR_CORTEX_A9_R2P10 0x412FC09A
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/* Cortex-A15 revisions */
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#define MIDR_CORTEX_A15_R0P0 0x410FC0F0
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#define MIDR_CORTEX_A15_R2P2 0x412FC0F2
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/* Cortex-A7 revisions */
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#define MIDR_CORTEX_A7_R0P0 0x410FC070
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#define MIDR_PRIMARY_PART_MASK 0xFF0FFFF0
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/* ID_PFR1 feature fields */
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#define CPUID_ARM_SEC_SHIFT 4
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#define CPUID_ARM_SEC_MASK (0xF << CPUID_ARM_SEC_SHIFT)
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#define CPUID_ARM_VIRT_SHIFT 12
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#define CPUID_ARM_VIRT_MASK (0xF << CPUID_ARM_VIRT_SHIFT)
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#define CPUID_ARM_GENTIMER_SHIFT 16
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#define CPUID_ARM_GENTIMER_MASK (0xF << CPUID_ARM_GENTIMER_SHIFT)
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/* valid bits in CBAR register / PERIPHBASE value */
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#define CBAR_MASK 0xFFFF8000
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/* CCSIDR */
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#define CCSIDR_LINE_SIZE_OFFSET 0
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#define CCSIDR_LINE_SIZE_MASK 0x7
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#define CCSIDR_ASSOCIATIVITY_OFFSET 3
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#define CCSIDR_ASSOCIATIVITY_MASK (0x3FF << 3)
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#define CCSIDR_NUM_SETS_OFFSET 13
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#define CCSIDR_NUM_SETS_MASK (0x7FFF << 13)
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/*
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* Values for InD field in CSSELR
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* Selects the type of cache
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*/
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#define ARMV7_CSSELR_IND_DATA_UNIFIED 0
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#define ARMV7_CSSELR_IND_INSTRUCTION 1
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/* Values for Ctype fields in CLIDR */
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#define ARMV7_CLIDR_CTYPE_NO_CACHE 0
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#define ARMV7_CLIDR_CTYPE_INSTRUCTION_ONLY 1
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#define ARMV7_CLIDR_CTYPE_DATA_ONLY 2
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#define ARMV7_CLIDR_CTYPE_INSTRUCTION_DATA 3
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#define ARMV7_CLIDR_CTYPE_UNIFIED 4
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#ifndef __ASSEMBLY__
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#include <linux/types.h>
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#include <asm/io.h>
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#include <asm/barriers.h>
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/*
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* Workaround for ARM errata # 798870
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* Set L2ACTLR[7] to reissue any memory transaction in the L2 that has been
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* stalled for 1024 cycles to verify that its hazard condition still exists.
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*/
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static inline void v7_enable_l2_hazard_detect(void)
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{
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uint32_t val;
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/* L2ACTLR[7]: Enable hazard detect timeout */
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asm volatile ("mrc p15, 1, %0, c15, c0, 0\n\t" : "=r"(val));
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val |= (1 << 7);
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asm volatile ("mcr p15, 1, %0, c15, c0, 0\n\t" : : "r"(val));
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}
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/*
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* Workaround for ARM errata # 799270
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* Ensure that the L2 logic has been used within the previous 256 cycles
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* before modifying the ACTLR.SMP bit. This is required during boot before
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* MMU has been enabled, or during a specified reset or power down sequence.
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*/
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static inline void v7_enable_smp(uint32_t address)
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{
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uint32_t temp, val;
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/* Read auxiliary control register */
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asm volatile ("mrc p15, 0, %0, c1, c0, 1\n\t" : "=r"(val));
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/* Enable SMP */
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val |= (1 << 6);
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/* Dummy read to assure L2 access */
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temp = readl(address);
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temp &= 0;
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val |= temp;
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/* Write auxiliary control register */
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asm volatile ("mcr p15, 0, %0, c1, c0, 1\n\t" : : "r"(val));
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CP15DSB;
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CP15ISB;
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}
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void v7_en_l2_hazard_detect(void);
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void v7_outer_cache_enable(void);
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void v7_outer_cache_disable(void);
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void v7_outer_cache_flush_all(void);
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void v7_outer_cache_inval_all(void);
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void v7_outer_cache_flush_range(u32 start, u32 end);
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void v7_outer_cache_inval_range(u32 start, u32 end);
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#ifdef CONFIG_ARMV7_NONSEC
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int armv7_init_nonsec(void);
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int armv7_apply_memory_carveout(u64 *start, u64 *size);
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bool armv7_boot_nonsec(void);
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/* defined in assembly file */
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unsigned int _nonsec_init(void);
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void _do_nonsec_entry(void *target_pc, unsigned long r0,
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unsigned long r1, unsigned long r2);
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void _smp_pen(void);
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extern char __secure_start[];
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extern char __secure_end[];
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extern char __secure_stack_start[];
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extern char __secure_stack_end[];
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#endif /* CONFIG_ARMV7_NONSEC */
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void v7_arch_cp15_set_l2aux_ctrl(u32 l2auxctrl, u32 cpu_midr,
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u32 cpu_rev_comb, u32 cpu_variant,
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u32 cpu_rev);
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void v7_arch_cp15_set_acr(u32 acr, u32 cpu_midr, u32 cpu_rev_comb,
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u32 cpu_variant, u32 cpu_rev);
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#endif /* ! __ASSEMBLY__ */
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#endif
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