diff options
Diffstat (limited to 'kernel/arch/mips/netlogic/common/smpboot.S')
| -rw-r--r-- | kernel/arch/mips/netlogic/common/smpboot.S | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/kernel/arch/mips/netlogic/common/smpboot.S b/kernel/arch/mips/netlogic/common/smpboot.S new file mode 100644 index 000000000..805355b0b --- /dev/null +++ b/kernel/arch/mips/netlogic/common/smpboot.S @@ -0,0 +1,143 @@ +/* + * Copyright 2003-2011 NetLogic Microsystems, Inc. (NetLogic). All rights + * reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the NetLogic + * license below: + * + * 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 ``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. + */ + + +#include <asm/asm.h> +#include <asm/asm-offsets.h> +#include <asm/regdef.h> +#include <asm/mipsregs.h> +#include <asm/stackframe.h> +#include <asm/asmmacro.h> +#include <asm/addrspace.h> + +#include <asm/netlogic/common.h> + +#include <asm/netlogic/xlp-hal/iomap.h> +#include <asm/netlogic/xlp-hal/xlp.h> +#include <asm/netlogic/xlp-hal/sys.h> +#include <asm/netlogic/xlp-hal/cpucontrol.h> + +#define CP0_EBASE $15 + + .set noreorder + .set noat + .set arch=xlr /* for mfcr/mtcr, XLR is sufficient */ + +/* Called by the boot cpu to wake up its sibling threads */ +NESTED(xlp_boot_core0_siblings, PT_SIZE, sp) + /* CPU register contents lost when enabling threads, save them first */ + SAVE_ALL + sync + /* find the location to which nlm_boot_siblings was relocated */ + li t0, CKSEG1ADDR(RESET_VEC_PHYS) + dla t1, nlm_reset_entry + dla t2, nlm_boot_siblings + dsubu t2, t1 + daddu t2, t0 + /* call it */ + jalr t2 + nop + RESTORE_ALL + jr ra + nop +END(xlp_boot_core0_siblings) + +NESTED(nlm_boot_secondary_cpus, 16, sp) + /* Initialize CP0 Status */ + move t1, zero +#ifdef CONFIG_64BIT + ori t1, ST0_KX +#endif + mtc0 t1, CP0_STATUS + PTR_LA t1, nlm_next_sp + PTR_L sp, 0(t1) + PTR_LA t1, nlm_next_gp + PTR_L gp, 0(t1) + + /* a0 has the processor id */ + mfc0 a0, CP0_EBASE, 1 + andi a0, 0x3ff /* a0 <- node/core */ + PTR_LA t0, nlm_early_init_secondary + jalr t0 + nop + + PTR_LA t0, smp_bootstrap + jr t0 + nop +END(nlm_boot_secondary_cpus) + +/* + * In case of RMIboot bootloader which is used on XLR boards, the CPUs + * be already woken up and waiting in bootloader code. + * This will get them out of the bootloader code and into linux. Needed + * because the bootloader area will be taken and initialized by linux. + */ +NESTED(nlm_rmiboot_preboot, 16, sp) + mfc0 t0, $15, 1 /* read ebase */ + andi t0, 0x1f /* t0 has the processor_id() */ + andi t2, t0, 0x3 /* thread num */ + sll t0, 2 /* offset in cpu array */ + + li t3, CKSEG1ADDR(RESET_DATA_PHYS) + ADDIU t1, t3, BOOT_CPU_READY + ADDU t1, t0 + li t3, 1 + sw t3, 0(t1) + + bnez t2, 1f /* skip thread programming */ + nop /* for thread id != 0 */ + + /* + * XLR MMU setup only for first thread in core + */ + li t0, 0x400 + mfcr t1, t0 + li t2, 6 /* XLR thread mode mask */ + nor t3, t2, zero + and t2, t1, t2 /* t2 - current thread mode */ + li v0, CKSEG1ADDR(RESET_DATA_PHYS) + lw v1, BOOT_THREAD_MODE(v0) /* v1 - new thread mode */ + sll v1, 1 + beq v1, t2, 1f /* same as request value */ + nop /* nothing to do */ + + and t2, t1, t3 /* mask out old thread mode */ + or t1, t2, v1 /* put in new value */ + mtcr t1, t0 /* update core control */ + + /* wait for NMI to hit */ +1: wait + b 1b + nop +END(nlm_rmiboot_preboot) |