/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

#pragma ident   "%Z%%M% %I%     %E% SMI"

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/sysmacros.h>
#include <sys/sunddi.h>
#include <sys/esunddi.h>
#include <sys/platform_module.h>
#include <sys/errno.h>
#include <sys/lgrp.h>
#include <sys/memnode.h>
#include <sys/promif.h>

int (*p2get_mem_unum)(int, uint64_t, char *, int, int *);

void
startup_platform(void)
{
}

int
set_platform_tsb_spares()
{
        return (0);
}

void
set_platform_defaults(void)
{
}

/*
 * Definitions for accessing the pci config space of the isa node
 * of Southbridge.
 */
#define SCHUMACHER_ISA_PATHNAME "/pci@1e,600000/isa@7"
static ddi_acc_handle_t isa_handle;             /* handle for isa pci space */


void
load_platform_drivers(void)
{
        dev_info_t              *dip;           /* dip of the isa driver */

        /*
         * Install 'us' driver.
         */
        (void) i_ddi_attach_hw_nodes("us");

        /*
         * mc-us3i must stay loaded for plat_get_mem_unum()
         */
        if (i_ddi_attach_hw_nodes("mc-us3i") != DDI_SUCCESS)
                cmn_err(CE_WARN, "mc-us3i driver failed to install");
        (void) ddi_hold_driver(ddi_name_to_major("mc-us3i"));

        /*
         * Install Isa driver. This is required for the southbridge IDE
         * workaround - to reset the IDE channel during IDE bus reset.
         * Panic the system in case ISA driver could not be loaded or
         * any problem in accessing its pci config space. Since the register
         * to reset the channel for IDE is in ISA config space!.
         */

        dip = e_ddi_hold_devi_by_path(SCHUMACHER_ISA_PATHNAME, 0);
        if (dip == NULL) {
                cmn_err(CE_PANIC, "Could not install the isa driver\n");
                return;
        }

        if (pci_config_setup(dip, &isa_handle) != DDI_SUCCESS) {
                cmn_err(CE_PANIC, "Could not get the config space of isa\n");
                return;
        }
}

/*
 * This routine provides a workaround for a bug in the SB chip which
 * can cause data corruption. Will be invoked from the IDE HBA driver for
 * Acer SouthBridge at the time of IDE bus reset.
 */
/*ARGSUSED*/
int
plat_ide_chipreset(dev_info_t *dip, int chno)
{
        uint8_t val;
        int     ret = DDI_SUCCESS;

        if (isa_handle == NULL) {
                return (DDI_FAILURE);
        }

        val = pci_config_get8(isa_handle, 0x58);
        /*
         * The dip passed as the argument is not used here.
         * This will be needed for platforms which have multiple on-board SB,
         * The dip passed will be used to match the corresponding ISA node.
         */
        switch (chno) {
                case 0:
                        /*
                         * First disable the primary channel then re-enable it.
                         * As per ALI no wait should be required in between have
                         * given 1ms delay in between to be on safer side.
                         * bit 2 of register 0x58 when 0 disable the channel 0.
                         * bit 2 of register 0x58 when 1 enables the channel 0.
                         */
                        pci_config_put8(isa_handle, 0x58, val & 0xFB);
                        drv_usecwait(1000);
                        pci_config_put8(isa_handle, 0x58, val);
                        break;
                case 1:
                        /*
                         * bit 3 of register 0x58 when 0 disable the channel 1.
                         * bit 3 of register 0x58 when 1 enables the channel 1.
                         */
                        pci_config_put8(isa_handle, 0x58, val & 0xF7);
                        drv_usecwait(1000);
                        pci_config_put8(isa_handle, 0x58, val);
                        break;
                default:
                        /*
                         * Unknown channel number passed. Return failure.
                         */
                        ret = DDI_FAILURE;
        }

        return (ret);
}


/*ARGSUSED*/
int
plat_cpu_poweron(struct cpu *cp)
{
        return (ENOTSUP);       /* not supported on this platform */
}

/*ARGSUSED*/
int
plat_cpu_poweroff(struct cpu *cp)
{
        return (ENOTSUP);       /* not supported on this platform */
}

/*ARGSUSED*/
void
plat_freelist_process(int mnode)
{
}

char *platform_module_list[] = {
        (char *)0
};

/*ARGSUSED*/
void
plat_tod_fault(enum tod_fault_type tod_bad)
{
}

/*ARGSUSED*/
int
plat_get_mem_unum(int synd_code, uint64_t flt_addr, int flt_bus_id,
    int flt_in_memory, ushort_t flt_status, char *buf, int buflen, int *lenp)
{
        if (flt_in_memory && (p2get_mem_unum != NULL))
                return (p2get_mem_unum(synd_code, P2ALIGN(flt_addr, 8),
                    buf, buflen, lenp));
        else
                return (ENOTSUP);
}

/*ARGSUSED*/
int
plat_get_cpu_unum(int cpuid, char *buf, int buflen, int *lenp)
{
        if (snprintf(buf, buflen, "MB") >= buflen) {
                return (ENOSPC);
        } else {
                *lenp = strlen(buf);
                return (0);
        }
}

/*
 * Fiesta support for lgroups.
 *
 * On fiesta platform, an lgroup platform handle == CPU id
 */

/*
 * Macro for extracting the CPU number from the CPU id
 */
#define CPUID_TO_LGRP(id)       ((id) & 0x7)
#define SCHUMACHER_MC_SHIFT     36

/*
 * Return the platform handle for the lgroup containing the given CPU
 */
lgrp_handle_t
plat_lgrp_cpu_to_hand(processorid_t id)
{
        return (CPUID_TO_LGRP(id));
}

/*
 * Platform specific lgroup initialization
 */
void
plat_lgrp_init(void)
{
        pnode_t         curnode;
        char            tmp_name[MAXSYSNAME];
        int             portid;
        int             cpucnt = 0;
        int             max_portid = -1;
        extern uint32_t lgrp_expand_proc_thresh;
        extern uint32_t lgrp_expand_proc_diff;
        extern pgcnt_t  lgrp_mem_free_thresh;
        extern uint32_t lgrp_loadavg_tolerance;
        extern uint32_t lgrp_loadavg_max_effect;
        extern uint32_t lgrp_load_thresh;
        extern lgrp_mem_policy_t  lgrp_mem_policy_root;

        /*
         * Count the number of CPUs installed to determine if
         * NUMA optimization should be enabled or not.
         *
         * All CPU nodes reside in the root node and have a
         * device type "cpu".
         */
        curnode = prom_rootnode();
        for (curnode = prom_childnode(curnode); curnode;
            curnode = prom_nextnode(curnode)) {
                bzero(tmp_name, MAXSYSNAME);
                if (prom_getprop(curnode, OBP_NAME, (caddr_t)tmp_name) == -1 ||
                    prom_getprop(curnode, OBP_DEVICETYPE, tmp_name) == -1 ||
                    strcmp(tmp_name, "cpu") != 0)
                        continue;

                cpucnt++;
                if (prom_getprop(curnode, "portid", (caddr_t)&portid) != -1 &&
                    portid > max_portid)
                        max_portid = portid;
        }
        if (cpucnt <= 1)
                max_mem_nodes = 1;
        else if (max_portid >= 0 && max_portid < MAX_MEM_NODES)
                max_mem_nodes = max_portid + 1;

        /*
         * Set tuneables for fiesta architecture
         *
         * lgrp_expand_proc_thresh is the minimum load on the lgroups
         * this process is currently running on before considering
         * expanding threads to another lgroup.
         *
         * lgrp_expand_proc_diff determines how much less the remote lgroup
         * must be loaded before expanding to it.
         *
         * Optimize for memory bandwidth by spreading multi-threaded
         * program to different lgroups.
         */
        lgrp_expand_proc_thresh = lgrp_loadavg_max_effect - 1;
        lgrp_expand_proc_diff = lgrp_loadavg_max_effect / 2;
        lgrp_loadavg_tolerance = lgrp_loadavg_max_effect / 2;
        lgrp_mem_free_thresh = 1;       /* home lgrp must have some memory */
        lgrp_expand_proc_thresh = lgrp_loadavg_max_effect - 1;
        lgrp_mem_policy_root = LGRP_MEM_POLICY_NEXT;
        lgrp_load_thresh = 0;

        mem_node_pfn_shift = SCHUMACHER_MC_SHIFT - MMU_PAGESHIFT;
}

/*
 * Return latency between "from" and "to" lgroups
 *
 * This latency number can only be used for relative comparison
 * between lgroups on the running system, cannot be used across platforms,
 * and may not reflect the actual latency.  It is platform and implementation
 * specific, so platform gets to decide its value.  It would be nice if the
 * number was at least proportional to make comparisons more meaningful though.
 * NOTE: The numbers below are supposed to be load latencies for uncached
 * memory divided by 10.
 */
int
plat_lgrp_latency(lgrp_handle_t from, lgrp_handle_t to)
{
        /*
         * Return remote latency when there are more than two lgroups
         * (root and child) and getting latency between two different
         * lgroups or root is involved
         */
        if (lgrp_optimizations() && (from != to ||
            from == LGRP_DEFAULT_HANDLE || to == LGRP_DEFAULT_HANDLE))
                return (17);
        else
                return (12);
}

int
plat_pfn_to_mem_node(pfn_t pfn)
{
        ASSERT(max_mem_nodes > 1);
        return (pfn >> mem_node_pfn_shift);
}

/*
 * Assign memnode to lgroups
 */
void
plat_fill_mc(pnode_t nodeid)
{
        int             portid;

        /*
         * Schumacher memory controller portid == global CPU id
         */
        if ((prom_getprop(nodeid, "portid", (caddr_t)&portid) == -1) ||
            (portid < 0))
                return;

        if (portid < max_mem_nodes)
                plat_assign_lgrphand_to_mem_node(portid, portid);
}