diff options
Diffstat (limited to 'arch/ia64/xen/xen_pv_ops.c')
| -rw-r--r-- | arch/ia64/xen/xen_pv_ops.c | 364 |
1 files changed, 0 insertions, 364 deletions
diff --git a/arch/ia64/xen/xen_pv_ops.c b/arch/ia64/xen/xen_pv_ops.c deleted file mode 100644 index 936cff3c96e..00000000000 --- a/arch/ia64/xen/xen_pv_ops.c +++ /dev/null @@ -1,364 +0,0 @@ -/****************************************************************************** - * arch/ia64/xen/xen_pv_ops.c - * - * Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> - * VA Linux Systems Japan K.K. - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - * - */ - -#include <linux/console.h> -#include <linux/irq.h> -#include <linux/kernel.h> -#include <linux/pm.h> - -#include <asm/xen/hypervisor.h> -#include <asm/xen/xencomm.h> -#include <asm/xen/privop.h> - -#include "irq_xen.h" -#include "time.h" - -/*************************************************************************** - * general info - */ -static struct pv_info xen_info __initdata = { - .kernel_rpl = 2, /* or 1: determin at runtime */ - .paravirt_enabled = 1, - .name = "Xen/ia64", -}; - -#define IA64_RSC_PL_SHIFT 2 -#define IA64_RSC_PL_BIT_SIZE 2 -#define IA64_RSC_PL_MASK \ - (((1UL << IA64_RSC_PL_BIT_SIZE) - 1) << IA64_RSC_PL_SHIFT) - -static void __init -xen_info_init(void) -{ - /* Xenified Linux/ia64 may run on pl = 1 or 2. - * determin at run time. */ - unsigned long rsc = ia64_getreg(_IA64_REG_AR_RSC); - unsigned int rpl = (rsc & IA64_RSC_PL_MASK) >> IA64_RSC_PL_SHIFT; - xen_info.kernel_rpl = rpl; -} - -/*************************************************************************** - * pv_init_ops - * initialization hooks. - */ - -static void -xen_panic_hypercall(struct unw_frame_info *info, void *arg) -{ - current->thread.ksp = (__u64)info->sw - 16; - HYPERVISOR_shutdown(SHUTDOWN_crash); - /* we're never actually going to get here... */ -} - -static int -xen_panic_event(struct notifier_block *this, unsigned long event, void *ptr) -{ - unw_init_running(xen_panic_hypercall, NULL); - /* we're never actually going to get here... */ - return NOTIFY_DONE; -} - -static struct notifier_block xen_panic_block = { - xen_panic_event, NULL, 0 /* try to go last */ -}; - -static void xen_pm_power_off(void) -{ - local_irq_disable(); - HYPERVISOR_shutdown(SHUTDOWN_poweroff); -} - -static void __init -xen_banner(void) -{ - printk(KERN_INFO - "Running on Xen! pl = %d start_info_pfn=0x%lx nr_pages=%ld " - "flags=0x%x\n", - xen_info.kernel_rpl, - HYPERVISOR_shared_info->arch.start_info_pfn, - xen_start_info->nr_pages, xen_start_info->flags); -} - -static int __init -xen_reserve_memory(struct rsvd_region *region) -{ - region->start = (unsigned long)__va( - (HYPERVISOR_shared_info->arch.start_info_pfn << PAGE_SHIFT)); - region->end = region->start + PAGE_SIZE; - return 1; -} - -static void __init -xen_arch_setup_early(void) -{ - struct shared_info *s; - BUG_ON(!xen_pv_domain()); - - s = HYPERVISOR_shared_info; - xen_start_info = __va(s->arch.start_info_pfn << PAGE_SHIFT); - - /* Must be done before any hypercall. */ - xencomm_initialize(); - - xen_setup_features(); - /* Register a call for panic conditions. */ - atomic_notifier_chain_register(&panic_notifier_list, - &xen_panic_block); - pm_power_off = xen_pm_power_off; - - xen_ia64_enable_opt_feature(); -} - -static void __init -xen_arch_setup_console(char **cmdline_p) -{ - add_preferred_console("xenboot", 0, NULL); - add_preferred_console("tty", 0, NULL); - /* use hvc_xen */ - add_preferred_console("hvc", 0, NULL); - -#if !defined(CONFIG_VT) || !defined(CONFIG_DUMMY_CONSOLE) - conswitchp = NULL; -#endif -} - -static int __init -xen_arch_setup_nomca(void) -{ - return 1; -} - -static void __init -xen_post_smp_prepare_boot_cpu(void) -{ - xen_setup_vcpu_info_placement(); -} - -static const struct pv_init_ops xen_init_ops __initconst = { - .banner = xen_banner, - - .reserve_memory = xen_reserve_memory, - - .arch_setup_early = xen_arch_setup_early, - .arch_setup_console = xen_arch_setup_console, - .arch_setup_nomca = xen_arch_setup_nomca, - - .post_smp_prepare_boot_cpu = xen_post_smp_prepare_boot_cpu, -}; - -/*************************************************************************** - * pv_cpu_ops - * intrinsics hooks. - */ - -static void xen_setreg(int regnum, unsigned long val) -{ - switch (regnum) { - case _IA64_REG_AR_KR0 ... _IA64_REG_AR_KR7: - xen_set_kr(regnum - _IA64_REG_AR_KR0, val); - break; -#ifdef CONFIG_IA32_SUPPORT - case _IA64_REG_AR_EFLAG: - xen_set_eflag(val); - break; -#endif - case _IA64_REG_CR_TPR: - xen_set_tpr(val); - break; - case _IA64_REG_CR_ITM: - xen_set_itm(val); - break; - case _IA64_REG_CR_EOI: - xen_eoi(val); - break; - default: - ia64_native_setreg_func(regnum, val); - break; - } -} - -static unsigned long xen_getreg(int regnum) -{ - unsigned long res; - - switch (regnum) { - case _IA64_REG_PSR: - res = xen_get_psr(); - break; -#ifdef CONFIG_IA32_SUPPORT - case _IA64_REG_AR_EFLAG: - res = xen_get_eflag(); - break; -#endif - case _IA64_REG_CR_IVR: - res = xen_get_ivr(); - break; - case _IA64_REG_CR_TPR: - res = xen_get_tpr(); - break; - default: - res = ia64_native_getreg_func(regnum); - break; - } - return res; -} - -/* turning on interrupts is a bit more complicated.. write to the - * memory-mapped virtual psr.i bit first (to avoid race condition), - * then if any interrupts were pending, we have to execute a hyperprivop - * to ensure the pending interrupt gets delivered; else we're done! */ -static void -xen_ssm_i(void) -{ - int old = xen_get_virtual_psr_i(); - xen_set_virtual_psr_i(1); - barrier(); - if (!old && xen_get_virtual_pend()) - xen_hyper_ssm_i(); -} - -/* turning off interrupts can be paravirtualized simply by writing - * to a memory-mapped virtual psr.i bit (implemented as a 16-bit bool) */ -static void -xen_rsm_i(void) -{ - xen_set_virtual_psr_i(0); - barrier(); -} - -static unsigned long -xen_get_psr_i(void) -{ - return xen_get_virtual_psr_i() ? IA64_PSR_I : 0; -} - -static void -xen_intrin_local_irq_restore(unsigned long mask) -{ - if (mask & IA64_PSR_I) - xen_ssm_i(); - else - xen_rsm_i(); -} - -static const struct pv_cpu_ops xen_cpu_ops __initdata = { - .fc = xen_fc, - .thash = xen_thash, - .get_cpuid = xen_get_cpuid, - .get_pmd = xen_get_pmd, - .getreg = xen_getreg, - .setreg = xen_setreg, - .ptcga = xen_ptcga, - .get_rr = xen_get_rr, - .set_rr = xen_set_rr, - .set_rr0_to_rr4 = xen_set_rr0_to_rr4, - .ssm_i = xen_ssm_i, - .rsm_i = xen_rsm_i, - .get_psr_i = xen_get_psr_i, - .intrin_local_irq_restore - = xen_intrin_local_irq_restore, -}; - -/****************************************************************************** - * replacement of hand written assembly codes. - */ - -extern char xen_switch_to; -extern char xen_leave_syscall; -extern char xen_work_processed_syscall; -extern char xen_leave_kernel; - -const struct pv_cpu_asm_switch xen_cpu_asm_switch = { - .switch_to = (unsigned long)&xen_switch_to, - .leave_syscall = (unsigned long)&xen_leave_syscall, - .work_processed_syscall = (unsigned long)&xen_work_processed_syscall, - .leave_kernel = (unsigned long)&xen_leave_kernel, -}; - -/*************************************************************************** - * pv_iosapic_ops - * iosapic read/write hooks. - */ -static void -xen_pcat_compat_init(void) -{ - /* nothing */ -} - -static struct irq_chip* -xen_iosapic_get_irq_chip(unsigned long trigger) -{ - return NULL; -} - -static unsigned int -xen_iosapic_read(char __iomem *iosapic, unsigned int reg) -{ - struct physdev_apic apic_op; - int ret; - - apic_op.apic_physbase = (unsigned long)iosapic - - __IA64_UNCACHED_OFFSET; - apic_op.reg = reg; - ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op); - if (ret) - return ret; - return apic_op.value; -} - -static void -xen_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val) -{ - struct physdev_apic apic_op; - - apic_op.apic_physbase = (unsigned long)iosapic - - __IA64_UNCACHED_OFFSET; - apic_op.reg = reg; - apic_op.value = val; - HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op); -} - -static const struct pv_iosapic_ops xen_iosapic_ops __initconst = { - .pcat_compat_init = xen_pcat_compat_init, - .__get_irq_chip = xen_iosapic_get_irq_chip, - - .__read = xen_iosapic_read, - .__write = xen_iosapic_write, -}; - -/*************************************************************************** - * pv_ops initialization - */ - -void __init -xen_setup_pv_ops(void) -{ - xen_info_init(); - pv_info = xen_info; - pv_init_ops = xen_init_ops; - pv_cpu_ops = xen_cpu_ops; - pv_iosapic_ops = xen_iosapic_ops; - pv_irq_ops = xen_irq_ops; - pv_time_ops = xen_time_ops; - - paravirt_cpu_asm_init(&xen_cpu_asm_switch); -} |