ti: k3: common: Add platform core management helpers
The K3 family of SoCs has multiple interconnects. The key interconnect for high performance processors is the MSMC3 interconnect. This is an io-coherent interconnect which exports multiple ports for each processor cluster. Sometimes, port 0 of the MSMC may not have an ARM cluster OR is isolated such that the instance of ATF does not manage it. Define macros in platform_def.h to help handle this. Signed-off-by: Benjamin Fair <b-fair@ti.com> Signed-off-by: Nishanth Menon <nm@ti.com> Signed-off-by: Andrew F. Davis <afd@ti.com>
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/*
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* Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <arch.h>
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#include <asm_macros.S>
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#include <platform_def.h>
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#define K3_BOOT_REASON_COLD_RESET 0x1
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/* ------------------------------------------------------------------
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* uintptr_t plat_get_my_entrypoint(void)
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* ------------------------------------------------------------------
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*
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* This function is called with the called with the MMU and caches
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* disabled (SCTLR_EL3.M = 0 and SCTLR_EL3.C = 0). The function is
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* responsible for distinguishing between a warm and cold reset for the
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* current CPU using platform-specific means. If it's a warm reset,
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* then it returns the warm reset entrypoint point provided to
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* plat_setup_psci_ops() during BL31 initialization. If it's a cold
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* reset then this function must return zero.
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*
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* This function does not follow the Procedure Call Standard used by
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* the Application Binary Interface for the ARM 64-bit architecture.
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* The caller should not assume that callee saved registers are
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* preserved across a call to this function.
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*/
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.globl plat_get_my_entrypoint
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func plat_get_my_entrypoint
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ldr x0, k3_boot_reason_data_store
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cmp x0, #K3_BOOT_REASON_COLD_RESET
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/* We ONLY support cold boot at this point */
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bne plat_unsupported_boot
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mov x0, #0
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ret
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/*
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* We self manage our boot reason.
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* At load time, we have just a default reason - which is cold reset
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*/
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k3_boot_reason_data_store:
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.word K3_BOOT_REASON_COLD_RESET
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plat_unsupported_boot:
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b plat_unsupported_boot
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endfunc plat_get_my_entrypoint
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/* ------------------------------------------------------------------
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* unsigned int plat_my_core_pos(void)
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* ------------------------------------------------------------------
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*
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* This function returns the index of the calling CPU which is used as a
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* CPU-specific linear index into blocks of memory (for example while
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* allocating per-CPU stacks). This function will be invoked very early
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* in the initialization sequence which mandates that this function
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* should be implemented in assembly and should not rely on the
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* avalability of a C runtime environment. This function can clobber x0
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* - x8 and must preserve x9 - x29.
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*
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* This function plays a crucial role in the power domain topology
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* framework in PSCI and details of this can be found in Power Domain
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* Topology Design.
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*/
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.globl plat_my_core_pos
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func plat_my_core_pos
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mrs x0, MPIDR_EL1
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and x1, x0, #MPIDR_CLUSTER_MASK
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lsr x1, x1, #MPIDR_AFF1_SHIFT
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and x0, x0, #MPIDR_CPU_MASK
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#if K3_CLUSTER1_MSMC_PORT != UNUSED
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cmp x1, #K3_CLUSTER0_MSMC_PORT
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b.eq out
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add x0, x0, #K3_CLUSTER0_CORE_COUNT
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#if K3_CLUSTER2_MSMC_PORT != UNUSED
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cmp x1, #K3_CLUSTER1_MSMC_PORT
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b.eq out
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add x0, x0, #K3_CLUSTER1_CORE_COUNT
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#if K3_CLUSTER3_MSMC_PORT != UNUSED
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cmp x1, #K3_CLUSTER2_MSMC_PORT
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b.eq out
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add x0, x0, #K3_CLUSTER2_CORE_COUNT
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#endif /* K3_CLUSTER3_MSMC_PORT != UNUSED */
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#endif /* K3_CLUSTER2_MSMC_PORT != UNUSED */
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#endif /* K3_CLUSTER1_MSMC_PORT != UNUSED */
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out:
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ret
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endfunc plat_my_core_pos
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@ -35,3 +35,4 @@ PLAT_BL_COMMON_SOURCES += \
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BL31_SOURCES += \
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${PLAT_PATH}/common/k3_bl31_setup.c \
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${PLAT_PATH}/common/k3_helpers.S \
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@ -22,6 +22,46 @@
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#define PLATFORM_STACK_SIZE 0x1000
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#endif
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#define PLATFORM_SYSTEM_COUNT 1
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#define PLATFORM_CORE_COUNT (K3_CLUSTER0_CORE_COUNT + \
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K3_CLUSTER1_CORE_COUNT + \
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K3_CLUSTER2_CORE_COUNT + \
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K3_CLUSTER3_CORE_COUNT)
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#define PLATFORM_CLUSTER_COUNT ((K3_CLUSTER0_MSMC_PORT != UNUSED) + \
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(K3_CLUSTER1_MSMC_PORT != UNUSED) + \
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(K3_CLUSTER2_MSMC_PORT != UNUSED) + \
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(K3_CLUSTER3_MSMC_PORT != UNUSED))
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#define UNUSED -1
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#if !defined(K3_CLUSTER1_CORE_COUNT) || !defined(K3_CLUSTER1_MSMC_PORT)
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#define K3_CLUSTER1_CORE_COUNT 0
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#define K3_CLUSTER1_MSMC_PORT UNUSED
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#endif
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#if !defined(K3_CLUSTER2_CORE_COUNT) || !defined(K3_CLUSTER2_MSMC_PORT)
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#define K3_CLUSTER2_CORE_COUNT 0
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#define K3_CLUSTER2_MSMC_PORT UNUSED
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#endif
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#if !defined(K3_CLUSTER3_CORE_COUNT) || !defined(K3_CLUSTER3_MSMC_PORT)
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#define K3_CLUSTER3_CORE_COUNT 0
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#define K3_CLUSTER3_MSMC_PORT UNUSED
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#endif
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#if K3_CLUSTER0_MSMC_PORT == UNUSED
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#error "ARM cluster 0 must be used"
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#endif
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#if ((K3_CLUSTER1_MSMC_PORT == UNUSED) && (K3_CLUSTER1_CORE_COUNT != 0)) || \
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((K3_CLUSTER2_MSMC_PORT == UNUSED) && (K3_CLUSTER2_CORE_COUNT != 0)) || \
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((K3_CLUSTER3_MSMC_PORT == UNUSED) && (K3_CLUSTER3_CORE_COUNT != 0))
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#error "Unused ports must have 0 ARM cores"
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#endif
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#define PLATFORM_CLUSTER_OFFSET K3_CLUSTER0_MSMC_PORT
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#define PLAT_NUM_PWR_DOMAINS (PLATFORM_CLUSTER_COUNT + \
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PLATFORM_CORE_COUNT)
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#define PLAT_MAX_PWR_LVL MPIDR_AFFLVL1
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