diff options
Diffstat (limited to 'arch/mips/netlogic/xlp/nlm_hal.c')
| -rw-r--r-- | arch/mips/netlogic/xlp/nlm_hal.c | 111 |
1 files changed, 111 insertions, 0 deletions
diff --git a/arch/mips/netlogic/xlp/nlm_hal.c b/arch/mips/netlogic/xlp/nlm_hal.c new file mode 100644 index 00000000000..9428e7125fe --- /dev/null +++ b/arch/mips/netlogic/xlp/nlm_hal.c @@ -0,0 +1,111 @@ +/* + * 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 <linux/types.h> +#include <linux/kernel.h> +#include <linux/mm.h> +#include <linux/delay.h> + +#include <asm/mipsregs.h> +#include <asm/time.h> + +#include <asm/netlogic/haldefs.h> +#include <asm/netlogic/xlp-hal/iomap.h> +#include <asm/netlogic/xlp-hal/xlp.h> +#include <asm/netlogic/xlp-hal/pic.h> +#include <asm/netlogic/xlp-hal/sys.h> + +/* These addresses are computed by the nlm_hal_init() */ +uint64_t nlm_io_base; +uint64_t nlm_sys_base; +uint64_t nlm_pic_base; + +/* Main initialization */ +void nlm_hal_init(void) +{ + nlm_io_base = CKSEG1ADDR(XLP_DEFAULT_IO_BASE); + nlm_sys_base = nlm_get_sys_regbase(0); /* node 0 */ + nlm_pic_base = nlm_get_pic_regbase(0); /* node 0 */ +} + +int nlm_irq_to_irt(int irq) +{ + if (!PIC_IRQ_IS_IRT(irq)) + return -1; + + switch (irq) { + case PIC_UART_0_IRQ: + return PIC_IRT_UART_0_INDEX; + case PIC_UART_1_IRQ: + return PIC_IRT_UART_1_INDEX; + default: + return -1; + } +} + +int nlm_irt_to_irq(int irt) +{ + switch (irt) { + case PIC_IRT_UART_0_INDEX: + return PIC_UART_0_IRQ; + case PIC_IRT_UART_1_INDEX: + return PIC_UART_1_IRQ; + default: + return -1; + } +} + +unsigned int nlm_get_core_frequency(int core) +{ + unsigned int pll_divf, pll_divr, dfs_div, ext_div; + unsigned int rstval, dfsval, denom; + uint64_t num; + + rstval = nlm_read_sys_reg(nlm_sys_base, SYS_POWER_ON_RESET_CFG); + dfsval = nlm_read_sys_reg(nlm_sys_base, SYS_CORE_DFS_DIV_VALUE); + pll_divf = ((rstval >> 10) & 0x7f) + 1; + pll_divr = ((rstval >> 8) & 0x3) + 1; + ext_div = ((rstval >> 30) & 0x3) + 1; + dfs_div = ((dfsval >> (core * 4)) & 0xf) + 1; + + num = 800000000ULL * pll_divf; + denom = 3 * pll_divr * ext_div * dfs_div; + do_div(num, denom); + return (unsigned int)num; +} + +unsigned int nlm_get_cpu_frequency(void) +{ + return nlm_get_core_frequency(0); +} |