e05d26567d
This commit separates certain SMP aspects into 'spec/smp' subdirectories. Thereby it simplifies non-SMP implementations again, where no locking and several platform specific maintainance operations are not needed. Moreover, it moves several platform specifics to appropriated places, removes dead code from x86, and starts to turn global static pointers into references that are handed over.
141 lines
3.5 KiB
ArmAsm
141 lines
3.5 KiB
ArmAsm
/*
|
|
* \brief Macros that are used by multiple assembly files
|
|
* \author Martin Stein
|
|
* \date 2014-01-13
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2014 Genode Labs GmbH
|
|
*
|
|
* This file is part of the Genode OS framework, which is distributed
|
|
* under the terms of the GNU General Public License version 2.
|
|
*/
|
|
|
|
/**
|
|
* Get base of the first kernel-stack and the common kernel-stack size
|
|
*
|
|
* \param base_dst_reg register that shall receive the stack-area base
|
|
* \param size_dst_reg register that shall receive the size of a kernel stack
|
|
*/
|
|
.macro _get_constraints_of_kernel_stacks base_dst_reg, size_dst_reg
|
|
|
|
ldr \base_dst_reg, =kernel_stack
|
|
ldr \size_dst_reg, =kernel_stack_size
|
|
ldr \size_dst_reg, [\size_dst_reg]
|
|
.endm
|
|
|
|
|
|
/**
|
|
* Calculate and apply kernel SP for a given kernel-stacks area
|
|
*
|
|
* \base_reg register that contains the base of the kernel-stacks area
|
|
* \size_reg register that contains the size of one kernel stack
|
|
*/
|
|
.macro _init_kernel_sp base_reg, size_reg
|
|
|
|
/* get kernel name of CPU */
|
|
_get_cpu_id sp
|
|
|
|
/* calculate top of the kernel-stack of this CPU and apply as SP */
|
|
add sp, #1
|
|
mul \size_reg, \size_reg, sp
|
|
add sp, \base_reg, \size_reg
|
|
.endm
|
|
|
|
|
|
/**
|
|
* Restore kernel SP from a given kernel context
|
|
*
|
|
* \context_reg register that contains the base of the kernel context
|
|
* \buf_reg_* registers that can be used as local buffers
|
|
*/
|
|
.macro _restore_kernel_sp context_reg, buf_reg_0, buf_reg_1
|
|
|
|
/* get base of the kernel-stacks area and the kernel-stack size */
|
|
add sp, \context_reg, #R12_OFFSET
|
|
ldm sp, {\buf_reg_0, \buf_reg_1}
|
|
|
|
/* calculate and apply kernel SP */
|
|
_init_kernel_sp \buf_reg_1, \buf_reg_0
|
|
.endm
|
|
|
|
|
|
/***************************************************
|
|
** Constant values that are pretty commonly used **
|
|
***************************************************/
|
|
|
|
/* alignment constraints */
|
|
.set MIN_PAGE_SIZE_LOG2, 12
|
|
.set DATA_ACCESS_ALIGNM_LOG2, 2
|
|
|
|
|
|
/***************************************************
|
|
** Constant values that the mode transition uses **
|
|
***************************************************/
|
|
|
|
/* kernel names of exceptions that can interrupt a user */
|
|
.set RST_TYPE, 1
|
|
.set UND_TYPE, 2
|
|
.set SVC_TYPE, 3
|
|
.set PAB_TYPE, 4
|
|
.set DAB_TYPE, 5
|
|
.set IRQ_TYPE, 6
|
|
.set FIQ_TYPE, 7
|
|
|
|
.set RST_PC_ADJUST, 0
|
|
.set UND_PC_ADJUST, 4
|
|
.set SVC_PC_ADJUST, 0
|
|
.set PAB_PC_ADJUST, 4
|
|
.set DAB_PC_ADJUST, 8
|
|
.set IRQ_PC_ADJUST, 4
|
|
.set FIQ_PC_ADJUST, 4
|
|
|
|
/* offsets of the member variables in a CPU context */
|
|
.set R12_OFFSET, 12 * 4
|
|
.set SP_OFFSET, 13 * 4
|
|
.set LR_OFFSET, 14 * 4
|
|
.set PC_OFFSET, 15 * 4
|
|
.set PSR_OFFSET, 16 * 4
|
|
.set EXCEPTION_TYPE_OFFSET, 17 * 4
|
|
.set TRANSIT_TTBR0_OFFSET, 17 * 4
|
|
.set CIDR_OFFSET, 18 * 4
|
|
.set TTBR0_OFFSET, 19 * 4
|
|
.set TTBCR_OFFSET, 20 * 4
|
|
.set MAIR0_OFFSET, 21 * 4
|
|
|
|
/* size of local variables */
|
|
.set CONTEXT_PTR_SIZE, 1 * 4
|
|
|
|
|
|
/*********************************************************
|
|
** Local data structures that the mode transition uses **
|
|
*********************************************************/
|
|
|
|
.macro _mt_local_variables
|
|
|
|
/* space for a copy of the kernel context */
|
|
.p2align 2
|
|
.global _mt_master_context_begin
|
|
_mt_master_context_begin:
|
|
.space 32 * 4
|
|
.global _mt_master_context_end
|
|
_mt_master_context_end:
|
|
|
|
/* space for a client context-pointer per CPU */
|
|
.p2align 2
|
|
.global _mt_client_context_ptr
|
|
_mt_client_context_ptr:
|
|
.rept NR_OF_CPUS
|
|
.space CONTEXT_PTR_SIZE
|
|
.endr
|
|
|
|
/* a globally mapped buffer per CPU */
|
|
.p2align 2
|
|
.global _mt_buffer
|
|
_mt_buffer:
|
|
.rept NR_OF_CPUS
|
|
.space BUFFER_SIZE
|
|
.endr
|
|
|
|
.endm /* _mt_local_variables */
|