| /* |
| * Copyright (c) 2004-2005 The Regents of The University of Michigan |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer; |
| * 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; |
| * neither the name of the copyright holders nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "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 THE COPYRIGHT |
| * OWNER 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. |
| */ |
| |
| /** |
| * @file |
| * This code loads the linux kernel, console, pal and patches certain |
| * functions. The symbol tables are loaded so that traces can show |
| * the executing function and we can skip functions. Various delay |
| * loops are skipped and their final values manually computed to speed |
| * up boot time. |
| */ |
| |
| #include "base/loader/symtab.hh" |
| #include "cpu/exec_context.hh" |
| #include "cpu/base.hh" |
| #include "kern/linux/linux_system.hh" |
| #include "kern/linux/linux_threadinfo.hh" |
| #include "kern/linux/printk.hh" |
| #include "mem/functional/memory_control.hh" |
| #include "mem/functional/physical.hh" |
| #include "sim/builder.hh" |
| #include "dev/platform.hh" |
| #include "targetarch/arguments.hh" |
| #include "targetarch/vtophys.hh" |
| |
| using namespace std; |
| |
| LinuxSystem::LinuxSystem(Params *p) |
| : System(p) |
| { |
| Addr addr = 0; |
| Addr paddr = 0; |
| |
| /** |
| * The symbol swapper_pg_dir marks the beginning of the kernel and |
| * the location of bootloader passed arguments |
| */ |
| if (!kernelSymtab->findAddress("swapper_pg_dir", KernelStart)) { |
| panic("Could not determine start location of kernel"); |
| } |
| |
| /** |
| * Since we aren't using a bootloader, we have to copy the |
| * kernel arguments directly into the kernel's memory. |
| */ |
| paddr = vtophys(physmem, CommandLine()); |
| char *commandline = (char *)physmem->dma_addr(paddr, sizeof(uint64_t)); |
| if (commandline) |
| strncpy(commandline, params->boot_osflags.c_str(), CommandLineSize); |
| |
| /** |
| * find the address of the est_cycle_freq variable and insert it |
| * so we don't through the lengthly process of trying to |
| * calculated it by using the PIT, RTC, etc. |
| */ |
| if (kernelSymtab->findAddress("est_cycle_freq", addr)) { |
| paddr = vtophys(physmem, addr); |
| uint8_t *est_cycle_frequency = |
| physmem->dma_addr(paddr, sizeof(uint64_t)); |
| |
| if (est_cycle_frequency) |
| *(uint64_t *)est_cycle_frequency = |
| Clock::Frequency / p->boot_cpu_frequency; |
| } |
| |
| |
| /** |
| * EV5 only supports 127 ASNs so we are going to tell the kernel that the |
| * paritiuclar EV6 we have only supports 127 asns. |
| * @todo At some point we should change ev5.hh and the palcode to support |
| * 255 ASNs. |
| */ |
| if (kernelSymtab->findAddress("dp264_mv", addr)) { |
| paddr = vtophys(physmem, addr); |
| char *dp264_mv = (char *)physmem->dma_addr(paddr, sizeof(uint64_t)); |
| |
| if (dp264_mv) { |
| *(uint32_t*)(dp264_mv+0x18) = htog((uint32_t)127); |
| } else |
| panic("could not translate dp264_mv addr\n"); |
| |
| } else |
| panic("could not find dp264_mv\n"); |
| |
| #ifndef NDEBUG |
| kernelPanicEvent = addKernelFuncEvent<BreakPCEvent>("panic"); |
| if (!kernelPanicEvent) |
| panic("could not find kernel symbol \'panic\'"); |
| |
| #if 0 |
| kernelDieEvent = addKernelFuncEvent<BreakPCEvent>("die_if_kernel"); |
| if (!kernelDieEvent) |
| panic("could not find kernel symbol \'die_if_kernel\'"); |
| #endif |
| |
| #endif |
| |
| /** |
| * Any time ide_delay_50ms, calibarte_delay or |
| * determine_cpu_caches is called just skip the |
| * function. Currently determine_cpu_caches only is used put |
| * information in proc, however if that changes in the future we |
| * will have to fill in the cache size variables appropriately. |
| */ |
| |
| skipIdeDelay50msEvent = |
| addKernelFuncEvent<SkipFuncEvent>("ide_delay_50ms"); |
| skipDelayLoopEvent = |
| addKernelFuncEvent<SkipDelayLoopEvent>("calibrate_delay"); |
| skipCacheProbeEvent = |
| addKernelFuncEvent<SkipFuncEvent>("determine_cpu_caches"); |
| debugPrintkEvent = addKernelFuncEvent<DebugPrintkEvent>("dprintk"); |
| idleStartEvent = addKernelFuncEvent<IdleStartEvent>("cpu_idle"); |
| |
| if (kernelSymtab->findAddress("alpha_switch_to", addr) && DTRACE(Thread)) { |
| printThreadEvent = new PrintThreadInfo(&pcEventQueue, "threadinfo", |
| addr + sizeof(MachInst) * 6); |
| } else { |
| printThreadEvent = NULL; |
| } |
| |
| if (params->bin_int) { |
| intStartEvent = addPalFuncEvent<InterruptStartEvent>("sys_int_21"); |
| if (!intStartEvent) |
| panic("could not find symbol: sys_int_21\n"); |
| |
| intEndEvent = addPalFuncEvent<InterruptEndEvent>("rti_to_kern"); |
| if (!intEndEvent) |
| panic("could not find symbol: rti_to_kern\n"); |
| |
| intEndEvent2 = addPalFuncEvent<InterruptEndEvent>("rti_to_user"); |
| if (!intEndEvent2) |
| panic("could not find symbol: rti_to_user\n"); |
| |
| intEndEvent3 = addKernelFuncEvent<InterruptEndEvent>("do_softirq"); |
| if (!intEndEvent3) |
| panic("could not find symbol: do_softirq\n"); |
| } |
| } |
| |
| LinuxSystem::~LinuxSystem() |
| { |
| #ifndef NDEBUG |
| delete kernelPanicEvent; |
| #endif |
| delete skipIdeDelay50msEvent; |
| delete skipDelayLoopEvent; |
| delete skipCacheProbeEvent; |
| delete debugPrintkEvent; |
| delete idleStartEvent; |
| delete printThreadEvent; |
| delete intStartEvent; |
| delete intEndEvent; |
| delete intEndEvent2; |
| } |
| |
| |
| void |
| LinuxSystem::setDelayLoop(ExecContext *xc) |
| { |
| Addr addr = 0; |
| if (kernelSymtab->findAddress("loops_per_jiffy", addr)) { |
| Addr paddr = vtophys(physmem, addr); |
| |
| uint8_t *loops_per_jiffy = |
| physmem->dma_addr(paddr, sizeof(uint32_t)); |
| |
| Tick cpuFreq = xc->cpu->frequency(); |
| Tick intrFreq = platform->intrFrequency(); |
| *(uint32_t *)loops_per_jiffy = |
| (uint32_t)((cpuFreq / intrFreq) * 0.9988); |
| } |
| } |
| |
| void |
| LinuxSystem::SkipDelayLoopEvent::process(ExecContext *xc) |
| { |
| SkipFuncEvent::process(xc); |
| // calculate and set loops_per_jiffy |
| ((LinuxSystem *)xc->system)->setDelayLoop(xc); |
| } |
| |
| void |
| LinuxSystem::DebugPrintkEvent::process(ExecContext *xc) |
| { |
| if (DTRACE(DebugPrintf)) { |
| if (!raw) { |
| StringWrap name(xc->system->name() + ".dprintk"); |
| DPRINTFN(""); |
| } |
| |
| AlphaArguments args(xc); |
| Printk(args); |
| SkipFuncEvent::process(xc); |
| } |
| } |
| |
| void |
| LinuxSystem::PrintThreadInfo::process(ExecContext *xc) |
| { |
| Linux::ThreadInfo ti(xc); |
| |
| DPRINTF(Thread, "Currently Executing Thread %s, pid %d, started at: %d\n", |
| ti.curTaskName(), ti.curTaskPID(), ti.curTaskStart()); |
| } |
| |
| |
| BEGIN_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem) |
| |
| Param<Tick> boot_cpu_frequency; |
| SimObjectParam<MemoryController *> memctrl; |
| SimObjectParam<PhysicalMemory *> physmem; |
| |
| Param<string> kernel; |
| Param<string> console; |
| Param<string> pal; |
| |
| Param<string> boot_osflags; |
| Param<string> readfile; |
| Param<unsigned int> init_param; |
| |
| Param<uint64_t> system_type; |
| Param<uint64_t> system_rev; |
| |
| Param<bool> bin; |
| VectorParam<string> binned_fns; |
| Param<bool> bin_int; |
| |
| END_DECLARE_SIM_OBJECT_PARAMS(LinuxSystem) |
| |
| BEGIN_INIT_SIM_OBJECT_PARAMS(LinuxSystem) |
| |
| INIT_PARAM(boot_cpu_frequency, "Frequency of the boot CPU"), |
| INIT_PARAM(memctrl, "memory controller"), |
| INIT_PARAM(physmem, "phsyical memory"), |
| INIT_PARAM(kernel, "file that contains the kernel code"), |
| INIT_PARAM(console, "file that contains the console code"), |
| INIT_PARAM(pal, "file that contains palcode"), |
| INIT_PARAM_DFLT(boot_osflags, "flags to pass to the kernel during boot", |
| "a"), |
| INIT_PARAM_DFLT(readfile, "file to read startup script from", ""), |
| INIT_PARAM_DFLT(init_param, "numerical value to pass into simulator", 0), |
| INIT_PARAM_DFLT(system_type, "Type of system we are emulating", 34), |
| INIT_PARAM_DFLT(system_rev, "Revision of system we are emulating", 1<<10), |
| INIT_PARAM_DFLT(bin, "is this system to be binned", false), |
| INIT_PARAM(binned_fns, "functions to be broken down and binned"), |
| INIT_PARAM_DFLT(bin_int, "is interrupt code binned seperately?", true) |
| |
| END_INIT_SIM_OBJECT_PARAMS(LinuxSystem) |
| |
| CREATE_SIM_OBJECT(LinuxSystem) |
| { |
| System::Params *p = new System::Params; |
| p->name = getInstanceName(); |
| p->boot_cpu_frequency = boot_cpu_frequency; |
| p->memctrl = memctrl; |
| p->physmem = physmem; |
| p->kernel_path = kernel; |
| p->console_path = console; |
| p->palcode = pal; |
| p->boot_osflags = boot_osflags; |
| p->init_param = init_param; |
| p->readfile = readfile; |
| p->system_type = system_type; |
| p->system_rev = system_rev; |
| p->bin = bin; |
| p->binned_fns = binned_fns; |
| p->bin_int = bin_int; |
| return new LinuxSystem(p); |
| } |
| |
| REGISTER_SIM_OBJECT("LinuxSystem", LinuxSystem) |
| |