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/*-
* Copyright 2003-2011 Netlogic Microsystems (Netlogic). All rights
* reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY Netlogic Microsystems ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL NETLOGIC OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
* NETLOGIC_BSD
* $FreeBSD$
*/
#include <machine/asm.h>
#include <machine/cpu.h>
#include <machine/cpuregs.h>
#include <mips/nlm/hal/iomap.h>
#include <mips/nlm/hal/sys.h>
#include <mips/nlm/hal/cpucontrol.h>
#define SYS_REG_KSEG1(node, reg) (0xa0000000 + XLP_DEFAULT_IO_BASE + \
XLP_IO_SYS_OFFSET(node) + XLP_IO_PCI_HDRSZ + (reg) * 4)
#include "assym.s"
.text
.set noat
.set noreorder
.set mips64
#define MFCR(rt,rs) .word ((0x1c<<26)|((rs)<<21)|((rt)<<16)|(0x18))
#define MTCR(rt,rs) .word ((0x1c<<26)|((rs)<<21)|((rt)<<16)|(0x19))
/*
* We need to do this to really flush the dcache before splitting it
*/
.macro flush_l1_dcache
.set push
.set noreorder
li $8, LSU_DEBUG_DATA0 /* use register number to handle */
li $9, LSU_DEBUG_ADDR /* different ABIs */
li t2, 0 /* index */
li t3, 0x1000 /* loop count, 512 sets * 8 whatever? */
1:
sll v0, t2, 5
MTCR(0, 8)
ori v1, v0, 0x3 /* way0 | write_enable | write_active */
MTCR(3, 9)
2:
MFCR(3, 9)
andi v1, 0x1 /* wait for write_active == 0 */
bnez v1, 2b
nop
MTCR(0, 8)
ori v1, v0, 0x7 /* way1 | write_enable | write_active */
MTCR(3, 9)
3:
MFCR(3, 9)
andi v1, 0x1 /* wait for write_active == 0 */
bnez v1, 3b
nop
addi t2, 1
bne t3, t2, 1b
nop
.set pop
.endm
VECTOR(XLPResetEntry, unknown)
mfc0 t0, MIPS_COP_0_STATUS
li t1, 0x80000
and t1, t0, t1
bnez t1, nmi_handler
nop
#ifdef SMP
/* Reset entry for secordary cores */
mfc0 t0, MIPS_COP_0_PRID, 1
srl t0, t0, 2 /* discard thread id */
andi t0, t0, 0x7 /* core id */
li t1, 1
sll t0, t1, t0
nor t0, t0, zero /* mask with core id bit clear */
/* clear CPU non-coherent bit */
li t2, SYS_REG_KSEG1(0, SYS_CPU_NONCOHERENT_MODE)
lw t1, 0(t2)
and t1, t1, t0
sw t1, 0(t2)
lw t1, 0(t2) /* read-back ensures operation complete */
sync
dla t2, mpentry
jr t2
nop
#endif
nop
/* NOT REACHED */
VECTOR_END(XLPResetEntry)
/* Not yet */
nmi_handler:
nop
nop
j nmi_handler
#ifdef SMP
/*
* Enable other threads in the core, called from thread 0
* of the core
*/
LEAF(xlp_enable_threads)
/*
* Save and restore callee saved registers of all ABIs
* Enabling threads trashes the registers
*/
dmtc0 sp, $4, 2 /* SP saved in UserLocal */
ori sp, sp, 0x7
xori sp, sp, 0x7 /* align 64 bit */
addiu sp, sp, -128
mfc0 t1, MIPS_COP_0_STATUS
sd s0, 0(sp)
sd s1, 8(sp)
sd s2, 16(sp)
sd s3, 24(sp)
sd s4, 32(sp)
sd s5, 40(sp)
sd s6, 48(sp)
sd s7, 56(sp)
sd s8, 64(sp)
sd t1, 72(sp)
sd gp, 80(sp)
sd ra, 88(sp)
flush_l1_dcache
/* Use register number to work in o32 and n32 */
li $9, ((CPU_BLOCKID_MAP << 8) | MAP_THREADMODE)
move $8, a0
sync
MTCR(8, 9)
mfc0 t0, MIPS_COP_0_PRID, 1
andi t0, 0x3
beqz t0, 2f
nop
dla t1, mpentry /* child thread, go to hardware init */
jr t1
nop
2: /*
* Parent hardware thread, restore registers, return
*/
#if 1
/*
* A0 Errata - Write MMU_SETUP after changing thread mode register.
*/
li $9, 0x400
li $8, 0
MTCR(8, 9)
sll zero,3 /* ehb */
#endif
dmfc0 t0, $4, 2 /* SP saved in UserLocal */
ori sp, t0, 0x7
xori sp, sp, 0x7 /* align 64 bit */
addiu sp, sp, -128
ld s0, 0(sp)
ld s1, 8(sp)
ld s2, 16(sp)
ld s3, 24(sp)
ld s4, 32(sp)
ld s5, 40(sp)
ld s6, 48(sp)
ld s7, 56(sp)
ld s8, 64(sp)
ld t1, 72(sp)
ld gp, 80(sp)
ld ra, 88(sp)
mfc0 t1, MIPS_COP_0_STATUS
move sp, t0 /* Restore the real SP */
jr.hb ra
nop
END(xlp_enable_threads)
#endif
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