mirror of
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150 lines
4.1 KiB
Plaintext
150 lines
4.1 KiB
Plaintext
#pypp 0
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// Iris: micro-kernel for a capability-based operating system.
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// mips/arch.hhp: mips-specific declarations and type definitions.
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// Copyright 2009 Bas Wijnen <wijnen@debian.org>
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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#ifndef _ARCH_HH
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#define _ARCH_HH
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#ifdef ARCH
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#ifndef ASM
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#include "board.hh"
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#endif
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#define reg_hack(x...) #x
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#define cp0_get(reg, target) do { __asm__ volatile ("mfc0 %0, $" reg_hack(reg) : "=r" (target)); } while (0)
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#define cp0_set(reg, value) do { __asm__ volatile ("mtc0 %0, $" reg_hack(reg) :: "r" (value)); } while (0)
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#define cp0_set0(reg) do { __asm__ volatile ("mtc0 $zero, $" reg_hack(reg)); } while (0)
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// cp0 registers.
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#define CP0_INDEX 0
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#define CP0_RANDOM 1
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#define CP0_ENTRY_LO0 2
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#define CP0_ENTRY_LO1 3
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#define CP0_CONTEXT 4
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#define CP0_PAGE_MASK 5
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#define CP0_WIRED 6
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#define CP0_BAD_V_ADDR 8
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#define CP0_COUNT 9
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#define CP0_ENTRY_HI 10
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#define CP0_COMPARE 11
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#define CP0_STATUS 12
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#define CP0_INT_CTL 12, 1
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#define CP0_CAUSE 13
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#define CP0_EPC 14
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#define CP0_P_R_ID 15
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#define CP0_EBASE 15, 1
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#define CP0_CONFIG 16
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#define CP0_CONFIG1 16, 1
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#define CP0_CONFIG2 16, 2
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#define CP0_CONFIG3 16, 3
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#define CP0_L_L_ADDR 17
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#define CP0_WATCH_LO 18
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#define CP0_WATCH_HI 19
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#define CP0_DEBUG 23
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#define CP0_DEPC 24
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#define CP0_PERF_CNT 25
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#define CP0_ERR_CTL 26
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#define CP0_CACHE_ERR 27
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#define CP0_TAG_LO 28, 0
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#define CP0_DATA_LO 28, 1
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#define CP0_TAG_HI 29, 0
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#define CP0_DATA_HI 29, 1
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#define CP0_ERROR_EPC 30
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#define CP0_DESAVE 31
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#endif
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#ifdef __KERNEL__
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// register save positions in kThread
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#define SAVE_PC (6 * 4)
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#define SAVE_SP (SAVE_PC + 4)
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#define SAVE_AT (SAVE_SP + 4)
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#define SAVE_V (SAVE_AT + 4)
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#define SAVE_A (SAVE_V + 2 * 4)
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#define SAVE_T (SAVE_A + 4 * 4)
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#define SAVE_S (SAVE_T + 10 * 4)
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#define SAVE_GP (SAVE_S + 8 * 4)
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#define SAVE_FP (SAVE_GP + 4)
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#define SAVE_RA (SAVE_FP + 4)
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#define SAVE_HI (SAVE_RA + 4)
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#define SAVE_LO (SAVE_HI + 4)
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#ifndef ASM
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void flush_tlb (unsigned asid)
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void arch_flush_cache ()
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struct kThread_arch:
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unsigned at, v[2], a[4], t[10], s[8], gp, fp, ra, hi, lo
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// The following is used for page mapping.
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// Each Memory has a directory with 0x400 page tables.
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// Page tables are pages which contain 0x200 EntryLo. values and 0x200
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// kPage pointers.
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// For a virtual address, bits 0-11 are in the physical address, bits 12-20 are
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// an index in the page table, bits 21-30 are an index in the page directory
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// and bit 31 is always 0.
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struct kPage_arch:
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kPageP prev_mapped, next_mapped
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struct Table:
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unsigned entrylo[0x200]
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kPage *page[0x200]
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struct kMemory_arch:
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unsigned asid
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Table **directory
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kPageP *shadow
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unsigned first_table
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// Pointers to kMemory when asid is taken, index of next free, or 0, if free.
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// asid[0] is used as index to first free asid.
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// asid value 0 is only used by the idle task.
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EXTERN unsigned asids[64]
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EXTERN kReceiverP arch_interrupt_receiver[32]
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// Functions which can be called from assembly must not be mangled.
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extern "C":
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// Kernel entry points, called from entry.S.
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kThread *interrupt ()
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kThread *cache_error ()
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kThread *exception ()
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kThread *tlb_refill ()
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#ifdef INIT
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// Initialize most things (the rest is done in boot.S)
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void init (unsigned mem)
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void board_init ()
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// Start running the idle task for the first time.
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void run_idle (kThread *self)
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#endif
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// These are "extern", not "EXTERN", because they really are defined elsewhere.
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#ifdef INIT
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extern unsigned thread_start[]
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#endif
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// Fast pointer to page directory, for tlb miss events
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extern Table **directory
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#endif // not defined ASM
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#endif // defined __KERNEL__
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#endif
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