mirror of
https://github.com/saymrwulf/pulp-runtime.git
synced 2026-05-26 22:35:49 +00:00
9e9bffbd50
Core 0 does the initialization as if it was the FC and then all the cores enter the main with the proper stack initialization.
196 lines
3.8 KiB
ArmAsm
196 lines
3.8 KiB
ArmAsm
#
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# Copyright (C) 2019 ETH Zurich, University of Bologna
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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#include "archi/pulp.h"
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#include "pulp.h"
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.section .text
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.global pos_init_entry
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pos_init_entry:
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# Cluster PEs will also starts here to avoid aligning another entry point
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# Just re-route them to the right entry
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#if defined(ARCHI_HAS_CLUSTER)
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csrr a0, 0xF14
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andi a1, a0, 0x1f
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#ifdef ARCHI_NO_FC
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# PEs from 1 to 7 will go to sync_loop and wait. PE0 will reach them
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# later after the pos_init_start. Then, they'll set up their stack into
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# the L1 and jump to cluster_entry_stub
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li t0, 0x10080000
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sw x0, 0(t0)
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bnez a0, sync_loop
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#else
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srli a0, a0, 5
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#ifdef ARCHI_CL_BOOT
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li a2, ARCHI_FC_CID
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beq a0, a2, do_cl_boot
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bnez a1, pe_start
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#else
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#ifdef ARCHI_FC_CID
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li a2, ARCHI_FC_CID
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bne a0, a2, pe_start
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#else
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bnez a1, pe_start
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#endif
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#endif
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#endif
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#endif
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# Clear the bss segment
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la t0, _bss_start
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la t1, _bss_end
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1:
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sw zero,0(t0)
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addi t0, t0, 4
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bltu t0, t1, 1b
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# Stack initialization
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la x2, stack
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/* Do all other initializations from C code */
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jal x1, pos_init_start
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#ifdef ARCHI_NO_FC
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csrr a0, 0xF14
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andi a1, a0, 0x1f
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li t0, 0x10080000
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li t1, 0x1
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sw t1, 0(t0)
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j pe_start
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#endif
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.section .text
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# On all other chips we simply pass 0.
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addi a0, x0, 0
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addi a1, x0, 0
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# Jump to main program entry point (argc = a0, argv = a1).
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la t2, main
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jalr x1, t2
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mv s0, a0
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/* Do all other deinitializations from C code */
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jal x1, pos_init_stop
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# If program returns from main, call exit routine
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mv a0, s0
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jal x1, exit
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.section .vectors, "ax"
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.option norvc;
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#ifdef ARCHI_CORE_HAS_1_10
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j __rt_handle_illegal_instr
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#else
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j pos_no_irq_handler
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#endif
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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j pos_no_irq_handler
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.org 0x80
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.global _start
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_start:
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jal x0, pos_init_entry
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pos_illegal_instr:
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j __rt_handle_illegal_instr
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pos_no_irq_handler:
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mret
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.global pos_semihosting_call
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pos_semihosting_call:
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ebreak
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jr ra
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#if defined(ARCHI_HAS_CLUSTER)
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pe_start:
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la x2, cluster_stacks
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lw x2, 0(x2)
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li x3, CLUSTER_STACK_SIZE
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addi a1, a1, 1
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mul x1, x3, a1
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add x2, x2, x1
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j cluster_entry_stub
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#endif
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do_cl_boot:
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li x2, 0x10200000
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li x3, 0x1
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la x4, _start
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sw x4, 0x40(x2)
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sw x3, 8(x2)
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loop:
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li x2, 0x1a109800
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sw x0, 0(x2)
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wfi
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j loop
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sync_loop:
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lw t1, 0(t0)
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bnez t1, pe_start
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j sync_loop
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