/* $NetBSD: sdp24xx_machdep.c,v 1.18 2016/12/24 17:36:59 mlelstv Exp $ */ /* * Machine dependent functions for kernel setup for TI OSK5912 board. * Based on lubbock_machdep.c which in turn was based on iq80310_machhdep.c * * Copyright (c) 2002, 2003, 2005 Genetec Corporation. All rights reserved. * Written by Hiroyuki Bessho for Genetec Corporation. * * 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. * 3. The name of Genetec Corporation may not be used to endorse or * promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY GENETEC CORPORATION ``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 GENETEC CORPORATION * 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. * * Copyright (c) 2001 Wasabi Systems, Inc. * All rights reserved. * * Written by Jason R. Thorpe for Wasabi Systems, Inc. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed for the NetBSD Project by * Wasabi Systems, Inc. * 4. The name of Wasabi Systems, Inc. may not be used to endorse * or promote products derived from this software without specific prior * written permission. * * THIS SOFTWARE IS PROVIDED BY WASABI SYSTEMS, INC. ``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 WASABI SYSTEMS, INC * 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. * * Copyright (c) 1997,1998 Mark Brinicombe. * Copyright (c) 1997,1998 Causality Limited. * All rights reserved. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Mark Brinicombe * for the NetBSD Project. * 4. The name of the company nor the name of the author may be used to * endorse or promote products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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. * * Copyright (c) 2007 Microsoft * All rights reserved. * * 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by Microsoft * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR OR CONTRIBUTERS 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 __KERNEL_RCSID(0, "$NetBSD: sdp24xx_machdep.c,v 1.18 2016/12/24 17:36:59 mlelstv Exp $"); #include "opt_machdep.h" #include "opt_ddb.h" #include "opt_kgdb.h" #include "opt_ipkdb.h" #include "opt_md.h" #include "opt_com.h" #include "opt_omap.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #ifdef KGDB #include #endif #include #include #include #include #include #include #include #include #include "omapwdt32k.h" BootConfig bootconfig; /* Boot config storage */ char *boot_args = NULL; char *boot_file = NULL; /* Physical address of the beginning of SDRAM. */ paddr_t physical_start; /* Physical address of the first byte after the end of SDRAM. */ paddr_t physical_end; /* Same things, but for the free (unused by the kernel) memory. */ static paddr_t physical_freestart, physical_freeend; static u_int free_pages; /* Physical address of the message buffer. */ paddr_t msgbufphys; extern char KERNEL_BASE_phys[]; extern char etext[], __data_start[], _edata[], __bss_start[], __bss_end__[]; extern char _end[]; #define KERNEL_PT_SYS 0 /* Page table for mapping proc0 zero page */ #define KERNEL_PT_KERNEL 1 /* Page table for mapping kernel */ #define KERNEL_PT_KERNEL_NUM 4 #define KERNEL_PT_VMDATA (KERNEL_PT_KERNEL+KERNEL_PT_KERNEL_NUM) /* Page tables for mapping kernel VM */ #define KERNEL_PT_VMDATA_NUM 4 /* start with 16MB of KVM */ #define NUM_KERNEL_PTS (KERNEL_PT_VMDATA + KERNEL_PT_VMDATA_NUM) pv_addr_t kernel_pt_table[NUM_KERNEL_PTS]; /* * Macros to translate between physical and virtual for a subset of the * kernel address space. *Not* for general use. */ #define KERNEL_BASE_PHYS ((paddr_t)&KERNEL_BASE_phys) #if 0 #define KERN_VTOPHYS(va) \ ((paddr_t)((vaddr_t)va - KERNEL_BASE + KERNEL_BASE_PHYS)) #define KERN_PHYSTOV(pa) \ ((vaddr_t)((paddr_t)pa - KERNEL_BASE_PHYS + KERNEL_BASE)) #else #define KERN_VTOPHYS(va) ((paddr_t)(va)) #define KERN_PHYSTOV(pa) ((vaddr_t)(pa)) #endif /* Prototypes */ void omap2430_intr_init(bus_space_tag_t); void consinit(void); #ifdef KGDB static void kgdb_port_init(void); #endif static void setup_real_page_tables(void); static void init_clocks(void); bs_protos(bs_notimpl); #include "com.h" #if NCOM > 0 #include #include #endif /* * void cpu_reboot(int howto, char *bootstr) * * Reboots the system * * Deal with any syncing, unmounting, dumping and shutdown hooks, * then reset the CPU. */ void cpu_reboot(int howto, char *bootstr) { #ifdef DIAGNOSTIC /* info */ printf("boot: howto=%08x curproc=%p\n", howto, curproc); #endif /* * If we are still cold then hit the air brakes * and crash to earth fast */ if (cold) { doshutdownhooks(); pmf_system_shutdown(boothowto); printf("The operating system has halted.\n"); printf("Please press any key to reboot.\n\n"); cngetc(); printf("rebooting...\n"); #if NOMAPWDT32K > 0 omapwdt32k_reboot(); #endif cpu_reset(); /*NOTREACHED*/ } /* Disable console buffering */ /* cnpollc(1);*/ /* * If RB_NOSYNC was not specified sync the discs. * Note: Unless cold is set to 1 here, syslogd will die during the * unmount. It looks like syslogd is getting woken up only to find * that it cannot page part of the binary in as the filesystem has * been unmounted. */ if (!(howto & RB_NOSYNC)) bootsync(); /* Say NO to interrupts */ splhigh(); /* Do a dump if requested. */ if ((howto & (RB_DUMP | RB_HALT)) == RB_DUMP) dumpsys(); /* Run any shutdown hooks */ doshutdownhooks(); pmf_system_shutdown(boothowto); /* Make sure IRQ's are disabled */ IRQdisable; if (howto & RB_HALT) { printf("The operating system has halted.\n"); printf("Please press any key to reboot.\n\n"); cngetc(); } printf("rebooting...\n"); #if NOMAPWDT32K > 0 omapwdt32k_reboot(); #endif cpu_reset(); /*NOTREACHED*/ } /* * Static device mappings. These peripheral registers are mapped at * fixed virtual addresses very early in initarm() so that we can use * them while booting the kernel, and stay at the same address * throughout whole kernel's life time. * * We use this table twice; once with bootstrap page table, and once * with kernel's page table which we build up in initarm(). * * Since we map these registers into the bootstrap page table using * pmap_devmap_bootstrap() which calls pmap_map_chunk(), we map * registers segment-aligned and segment-rounded in order to avoid * using the 2nd page tables. */ #define _A(a) ((a) & ~L1_S_OFFSET) #define _S(s) (((s) + L1_S_SIZE - 1) & ~(L1_S_SIZE-1)) static const struct pmap_devmap devmap[] = { { /* * Map the first 1MB of L4 Core area * this gets us the console UART, GP timers, interrupt * controller and GPIO5. */ .pd_va = _A(OMAP2430_L4_CORE_VBASE), .pd_pa = _A(OMAP2430_L4_CORE_BASE), .pd_size = _S(1 << 20), .pd_prot = VM_PROT_READ|VM_PROT_WRITE, .pd_cache = PTE_NOCACHE }, { /* * Map the first 1MB of L4 Wakeup area * this gets us GPIO[1-4] and Clock Management regs */ .pd_va = _A(OMAP2430_L4_WAKEUP_VBASE), .pd_pa = _A(OMAP2430_L4_WAKEUP_BASE), .pd_size = _S(1 << 20), .pd_prot = VM_PROT_READ|VM_PROT_WRITE, .pd_cache = PTE_NOCACHE }, {0} }; #undef _A #undef _S #ifdef DDB static void sdp_db_trap(int where) { #if NOMAPWDT32K > 0 static int oldwatchdogstate; if (where) { oldwatchdogstate = omapwdt32k_enable(0); } else { omapwdt32k_enable(oldwatchdogstate); } #endif } #endif void sdp_putchar(char c); void sdp_putchar(char c) { unsigned char *com0addr = (char *)CONSADDR_VA; int timo = 150000; while ((com0addr[5 * 4] & 0x20) == 0) if (--timo == 0) break; com0addr[0] = c; while ((com0addr[5 * 4] & 0x20) == 0) if (--timo == 0) break; } /* * u_int initarm(...) * * Initial entry point on startup. This gets called before main() is * entered. * It should be responsible for setting up everything that must be * in place when main is called. * This includes * Taking a copy of the boot configuration structure. * Initialising the physical console so characters can be printed. * Setting up page tables for the kernel * Relocating the kernel to the bottom of physical memory */ u_int initarm(void *arg) { #if 1 sdp_putchar('d'); #endif /* * When we enter here, we are using a temporary first level * translation table with section entries in it to cover the OBIO * peripherals and SDRAM. The temporary first level translation table * is at the end of SDRAM. */ /* Heads up ... Setup the CPU / MMU / TLB functions. */ if (set_cpufuncs()) panic("cpu not recognized!"); init_clocks(); /* The console is going to try to map things. Give pmap a devmap. */ pmap_devmap_register(devmap); consinit(); #if 1 sdp_putchar('h'); #endif #ifdef KGDB kgdb_port_init(); #endif #ifdef VERBOSE_INIT_ARM /* Talk to the user */ printf("\nNetBSD/evbarm (SDP24xx) booting ...\n"); #endif #ifdef BOOT_ARGS char mi_bootargs[] = BOOT_ARGS; parse_mi_bootargs(mi_bootargs); #endif #ifdef VERBOSE_INIT_ARM printf("initarm: Configuring system ...\n"); #endif /* * Set up the variables that define the availability of physical * memory. */ physical_start = KERNEL_BASE_PHYS; #define MEMSIZE_BYTES (MEMSIZE * 1024 * 1024) physical_end = (physical_start & ~(0x400000-1)) + MEMSIZE_BYTES; physmem = (physical_end - physical_start) / PAGE_SIZE; /* Fake bootconfig structure for the benefit of pmap.c. */ bootconfig.dramblocks = 1; bootconfig.dram[0].address = physical_start; bootconfig.dram[0].pages = physmem; /* * Our kernel is at the beginning of memory, so set our free space to * all the memory after the kernel. */ physical_freestart = KERN_VTOPHYS(round_page((vaddr_t) _end)); physical_freeend = physical_end; free_pages = (physical_freeend - physical_freestart) / PAGE_SIZE; /* * This is going to do all the hard work of setting up the first and * and second level page tables. Pages of memory will be allocated * and mapped for other structures that are required for system * operation. When it returns, physical_freestart and free_pages will * have been updated to reflect the allocations that were made. In * addition, kernel_l1pt, kernel_pt_table[], systempage, irqstack, * abtstack, undstack, kernelstack, msgbufphys will be set to point to * the memory that was allocated for them. */ setup_real_page_tables(); /* * Moved from cpu_startup() as data_abort_handler() references * this during uvm init. */ uvm_lwp_setuarea(&lwp0, kernelstack.pv_va); #ifdef VERBOSE_INIT_ARM printf("bootstrap done.\n"); #endif arm32_vector_init(ARM_VECTORS_HIGH, ARM_VEC_ALL); /* * Pages were allocated during the secondary bootstrap for the * stacks for different CPU modes. * We must now set the r13 registers in the different CPU modes to * point to these stacks. * Since the ARM stacks use STMFD etc. we must set r13 to the top end * of the stack memory. */ #ifdef VERBOSE_INIT_ARM printf("init subsystems: stacks "); #endif set_stackptr(PSR_FIQ32_MODE, fiqstack.pv_va + FIQ_STACK_SIZE * PAGE_SIZE); set_stackptr(PSR_IRQ32_MODE, irqstack.pv_va + IRQ_STACK_SIZE * PAGE_SIZE); set_stackptr(PSR_ABT32_MODE, abtstack.pv_va + ABT_STACK_SIZE * PAGE_SIZE); set_stackptr(PSR_UND32_MODE, undstack.pv_va + UND_STACK_SIZE * PAGE_SIZE); /* * Well we should set a data abort handler. * Once things get going this will change as we will need a proper * handler. * Until then we will use a handler that just panics but tells us * why. * Initialisation of the vectors will just panic on a data abort. * This just fills in a slightly better one. */ #ifdef VERBOSE_INIT_ARM printf("vectors "); #endif data_abort_handler_address = (u_int)data_abort_handler; prefetch_abort_handler_address = (u_int)prefetch_abort_handler; undefined_handler_address = (u_int)undefinedinstruction_bounce; /* Initialise the undefined instruction handlers */ #ifdef VERBOSE_INIT_ARM printf("undefined "); #endif undefined_init(); /* Load memory into UVM. */ #ifdef VERBOSE_INIT_ARM printf("page "); #endif uvm_md_init(); uvm_page_physload(atop(physical_freestart), atop(physical_freeend), atop(physical_freestart), atop(physical_freeend), VM_FREELIST_DEFAULT); /* Boot strap pmap telling it where the kernel page table is */ #ifdef VERBOSE_INIT_ARM printf("pmap "); #endif pmap_bootstrap(KERNEL_VM_BASE, KERNEL_VM_BASE + KERNEL_VM_SIZE); #ifdef VERBOSE_INIT_ARM printf("done.\n"); #endif #ifdef IPKDB /* Initialise ipkdb */ ipkdb_init(); if (boothowto & RB_KDB) ipkdb_connect(0); #endif #ifdef KGDB if (boothowto & RB_KDB) { kgdb_debug_init = 1; kgdb_connect(1); } #endif #ifdef DDB db_trap_callback = sdp_db_trap; db_machine_init(); /* Firmware doesn't load symbols. */ ddb_init(0, NULL, NULL); if (boothowto & RB_KDB) Debugger(); #endif printf("initarm done.\n"); /* We return the new stack pointer address */ return(kernelstack.pv_va + USPACE_SVC_STACK_TOP); } void arm11_pmc_ccnt_init(void); static void init_clocks(void) { #ifdef NOTYET static volatile uint32_t * const clksel_reg = (volatile uint32_t *) (OMAP2430_L4_WAKEUP_VBASE + OMAP2_CM_BASE + OMAP2_CM_CLKSEL_MPU - OMAP2430_L4_WAKEUP_BASE); uint32_t v; sdp_putchar('E'); v = *clksel_reg; sdp_putchar('F'); if (v != OMAP2430_CM_CLKSEL_MPU_FULLSPEED) { printf("Changed CPU speed from half (%d) ", v); *clksel_reg = OMAP2430_CM_CLKSEL_MPU_FULLSPEED; printf("to full speed.\n"); } sdp_putchar('G'); #endif arm11_pmc_ccnt_init(); } #ifndef CONSADDR #error Specify the address of the console UART with the CONSADDR option. #endif #ifndef CONSPEED #define CONSPEED 115200 #endif #ifndef CONMODE #define CONMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ #endif static const bus_addr_t consaddr = CONSADDR; static const int conspeed = CONSPEED; static const int conmode = CONMODE; void consinit(void) { bus_space_handle_t bh; static int consinit_called = 0; if (consinit_called != 0) return; consinit_called = 1; sdp_putchar('e'); if (bus_space_map(&omap_a4x_bs_tag, consaddr, OMAP_COM_SIZE, 0, &bh)) panic("Serial console can not be mapped."); if (comcnattach(&omap_a4x_bs_tag, consaddr, conspeed, OMAP_COM_FREQ, COM_TYPE_NORMAL, conmode)) panic("Serial console can not be initialized."); bus_space_unmap(&omap_a4x_bs_tag, bh, OMAP_COM_SIZE); sdp_putchar('f'); sdp_putchar('g'); } #ifdef KGDB #ifndef KGDB_DEVADDR #error Specify the address of the kgdb UART with the KGDB_DEVADDR option. #endif #ifndef KGDB_DEVRATE #define KGDB_DEVRATE 115200 #endif #ifndef KGDB_DEVMODE #define KGDB_DEVMODE ((TTYDEF_CFLAG & ~(CSIZE | CSTOPB | PARENB)) | CS8) /* 8N1 */ #endif static const vaddr_t comkgdbaddr = KGDB_DEVADDR; static const int comkgdbspeed = KGDB_DEVRATE; static const int comkgdbmode = KGDB_DEVMODE; void static kgdb_port_init(void) { static int kgdbsinit_called = 0; if (kgdbsinit_called != 0) return; kgdbsinit_called = 1; bus_space_handle_t bh; if (bus_space_map(&omap_a4x_bs_tag, comkgdbaddr, OMAP_COM_SIZE, 0, &bh)) panic("kgdb port can not be mapped."); if (com_kgdb_attach(&omap_a4x_bs_tag, comkgdbaddr, comkgdbspeed, OMAP_COM_FREQ, COM_TYPE_NORMAL, comkgdbmode)) panic("KGDB uart can not be initialized."); bus_space_unmap(&omap_a4x_bs_tag, bh, OMAP_COM_SIZE); } #endif static void setup_real_page_tables(void) { /* * We need to allocate some fixed page tables to get the kernel going. * * We are going to allocate our bootstrap pages from the beginning of * the free space that we just calculated. We allocate one page * directory and a number of page tables and store the physical * addresses in the kernel_pt_table array. * * The kernel page directory must be on a 16K boundary. The page * tables must be on 4K boundaries. What we do is allocate the * page directory on the first 16K boundary that we encounter, and * the page tables on 4K boundaries otherwise. Since we allocate * at least 3 L2 page tables, we are guaranteed to encounter at * least one 16K aligned region. */ #ifdef VERBOSE_INIT_ARM printf("Allocating page tables\n"); #endif /* * Define a macro to simplify memory allocation. As we allocate the * memory, make sure that we don't walk over our temporary first level * translation table. */ #define valloc_pages(var, np) \ (var).pv_pa = physical_freestart; \ physical_freestart += ((np) * PAGE_SIZE); \ if (physical_freestart > (physical_freeend - L1_TABLE_SIZE)) \ panic("initarm: out of memory"); \ free_pages -= (np); \ (var).pv_va = KERN_PHYSTOV((var).pv_pa); \ memset((char *)(var).pv_va, 0, ((np) * PAGE_SIZE)); int loop, pt_index; pt_index = 0; kernel_l1pt.pv_pa = 0; kernel_l1pt.pv_va = 0; printf("%s: physical_freestart %#lx\n", __func__, physical_freestart); for (loop = 0; loop <= NUM_KERNEL_PTS; ++loop) { /* Are we 16KB aligned for an L1 ? */ if ((physical_freestart & (L1_TABLE_SIZE - 1)) == 0 && kernel_l1pt.pv_pa == 0) { valloc_pages(kernel_l1pt, L1_TABLE_SIZE / PAGE_SIZE); } else { valloc_pages(kernel_pt_table[pt_index], L2_TABLE_SIZE / PAGE_SIZE); ++pt_index; } } pt_index=0; printf("%s: kernel_l1pt: %#lx:%#lx\n", __func__, kernel_l1pt.pv_va, kernel_l1pt.pv_pa); printf("%s: kernel_pt_table:\n", __func__); for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { printf("\t%#lx:%#lx\n", kernel_pt_table[pt_index].pv_va, kernel_pt_table[pt_index].pv_pa); ++pt_index; } /* This should never be able to happen but better confirm that. */ if (!kernel_l1pt.pv_pa || (kernel_l1pt.pv_pa & (L1_TABLE_SIZE-1)) != 0) panic("initarm: Failed to align the kernel page directory"); /* * Allocate a page for the system page mapped to V0x00000000 * This page will just contain the system vectors and can be * shared by all processes. */ valloc_pages(systempage, 1); systempage.pv_va = ARM_VECTORS_HIGH; /* Allocate stacks for all modes */ valloc_pages(fiqstack, FIQ_STACK_SIZE); valloc_pages(irqstack, IRQ_STACK_SIZE); valloc_pages(abtstack, ABT_STACK_SIZE); valloc_pages(undstack, UND_STACK_SIZE); valloc_pages(kernelstack, UPAGES); /* Allocate the message buffer. */ pv_addr_t msgbuf; int msgbuf_pgs = round_page(MSGBUFSIZE) / PAGE_SIZE; valloc_pages(msgbuf, msgbuf_pgs); msgbufphys = msgbuf.pv_pa; /* * Ok we have allocated physical pages for the primary kernel * page tables */ #ifdef VERBOSE_INIT_ARM printf("Creating L1 page table at 0x%08lx\n", kernel_l1pt.pv_pa); #endif /* * Now we start construction of the L1 page table * We start by mapping the L2 page tables into the L1. * This means that we can replace L1 mappings later on if necessary */ vaddr_t l1_va = kernel_l1pt.pv_va; paddr_t l1_pa = kernel_l1pt.pv_pa; /* Map the L2 pages tables in the L1 page table */ pmap_link_l2pt(l1_va, ARM_VECTORS_HIGH & ~(0x00400000 - 1), &kernel_pt_table[KERNEL_PT_SYS]); for (loop = 0; loop < KERNEL_PT_KERNEL_NUM; loop++) pmap_link_l2pt(l1_va, KERNEL_BASE + loop * 0x00400000, &kernel_pt_table[KERNEL_PT_KERNEL + loop]); for (loop = 0; loop < KERNEL_PT_VMDATA_NUM; loop++) pmap_link_l2pt(l1_va, KERNEL_VM_BASE + loop * 0x00400000, &kernel_pt_table[KERNEL_PT_VMDATA + loop]); /* update the top of the kernel VM */ pmap_curmaxkvaddr = KERNEL_VM_BASE + (KERNEL_PT_VMDATA_NUM * 0x00400000); #ifdef VERBOSE_INIT_ARM printf("Mapping kernel\n"); #endif /* Now we fill in the L2 pagetable for the kernel static code/data */ #define round_L_page(x) (((x) + L2_L_OFFSET) & L2_L_FRAME) size_t textsize = round_L_page(etext - KERNEL_BASE_phys); size_t totalsize = round_L_page(_end - KERNEL_BASE_phys); /* offset of kernel in RAM */ u_int offset = 0; /* Map text section read-only. */ offset += pmap_map_chunk(l1_va, physical_start + offset, physical_start + offset, textsize, VM_PROT_READ|VM_PROT_EXECUTE, PTE_CACHE); /* Map data and bss sections read-write. */ offset += pmap_map_chunk(l1_va, physical_start + offset, physical_start + offset, totalsize - textsize, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); #ifdef VERBOSE_INIT_ARM printf("Constructing L2 page tables\n"); #endif /* Map the stack pages */ pmap_map_chunk(l1_va, fiqstack.pv_va, fiqstack.pv_pa, FIQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); pmap_map_chunk(l1_va, irqstack.pv_va, irqstack.pv_pa, IRQ_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); pmap_map_chunk(l1_va, abtstack.pv_va, abtstack.pv_pa, ABT_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); pmap_map_chunk(l1_va, undstack.pv_va, undstack.pv_pa, UND_STACK_SIZE * PAGE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); pmap_map_chunk(l1_va, kernelstack.pv_va, kernelstack.pv_pa, UPAGES * PAGE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_CACHE); pmap_map_chunk(l1_va, kernel_l1pt.pv_va, kernel_l1pt.pv_pa, L1_TABLE_SIZE, VM_PROT_READ | VM_PROT_WRITE, PTE_PAGETABLE); for (loop = 0; loop < NUM_KERNEL_PTS; ++loop) { pmap_map_chunk(l1_va, kernel_pt_table[loop].pv_va, kernel_pt_table[loop].pv_pa, L2_TABLE_SIZE, VM_PROT_READ|VM_PROT_WRITE, PTE_PAGETABLE); } /* Map the vector page. */ pmap_map_entry(l1_va, ARM_VECTORS_HIGH, systempage.pv_pa, VM_PROT_READ|VM_PROT_WRITE, PTE_CACHE); /* * Map integrated peripherals at same address in first level page * table so that we can continue to use console. */ pmap_devmap_bootstrap(l1_va, devmap); #ifdef VERBOSE_INIT_ARM /* Tell the user about where all the bits and pieces live. */ printf("%22s Physical Virtual Num\n", " "); printf("%22s Starting Ending Starting Ending Pages\n", " "); static const char mem_fmt[] = "%20s: 0x%08lx 0x%08lx 0x%08lx 0x%08lx %d\n"; static const char mem_fmt_nov[] = "%20s: 0x%08lx 0x%08lx %d\n"; printf(mem_fmt, "SDRAM", physical_start, physical_end-1, KERN_PHYSTOV(physical_start), KERN_PHYSTOV(physical_end-1), (int)physmem); printf(mem_fmt, "text section", KERN_VTOPHYS(physical_start), KERN_VTOPHYS(etext-1), (vaddr_t)KERNEL_BASE_phys, (vaddr_t)etext-1, (int)(textsize / PAGE_SIZE)); printf(mem_fmt, "data section", KERN_VTOPHYS(__data_start), KERN_VTOPHYS(_edata), (vaddr_t)__data_start, (vaddr_t)_edata, (int)((round_page((vaddr_t)_edata) - trunc_page((vaddr_t)__data_start)) / PAGE_SIZE)); printf(mem_fmt, "bss section", KERN_VTOPHYS(__bss_start), KERN_VTOPHYS(__bss_end__), (vaddr_t)__bss_start, (vaddr_t)__bss_end__, (int)((round_page((vaddr_t)__bss_end__) - trunc_page((vaddr_t)__bss_start)) / PAGE_SIZE)); printf(mem_fmt, "L1 page directory", kernel_l1pt.pv_pa, kernel_l1pt.pv_pa + L1_TABLE_SIZE - 1, kernel_l1pt.pv_va, kernel_l1pt.pv_va + L1_TABLE_SIZE - 1, L1_TABLE_SIZE / PAGE_SIZE); printf(mem_fmt, "Exception Vectors", systempage.pv_pa, systempage.pv_pa + PAGE_SIZE - 1, (vaddr_t)ARM_VECTORS_HIGH, (vaddr_t)ARM_VECTORS_HIGH + PAGE_SIZE - 1, 1); printf(mem_fmt, "FIQ stack", fiqstack.pv_pa, fiqstack.pv_pa + (FIQ_STACK_SIZE * PAGE_SIZE) - 1, fiqstack.pv_va, fiqstack.pv_va + (FIQ_STACK_SIZE * PAGE_SIZE) - 1, FIQ_STACK_SIZE); printf(mem_fmt, "IRQ stack", irqstack.pv_pa, irqstack.pv_pa + (IRQ_STACK_SIZE * PAGE_SIZE) - 1, irqstack.pv_va, irqstack.pv_va + (IRQ_STACK_SIZE * PAGE_SIZE) - 1, IRQ_STACK_SIZE); printf(mem_fmt, "ABT stack", abtstack.pv_pa, abtstack.pv_pa + (ABT_STACK_SIZE * PAGE_SIZE) - 1, abtstack.pv_va, abtstack.pv_va + (ABT_STACK_SIZE * PAGE_SIZE) - 1, ABT_STACK_SIZE); printf(mem_fmt, "UND stack", undstack.pv_pa, undstack.pv_pa + (UND_STACK_SIZE * PAGE_SIZE) - 1, undstack.pv_va, undstack.pv_va + (UND_STACK_SIZE * PAGE_SIZE) - 1, UND_STACK_SIZE); printf(mem_fmt, "SVC stack", kernelstack.pv_pa, kernelstack.pv_pa + (UPAGES * PAGE_SIZE) - 1, kernelstack.pv_va, kernelstack.pv_va + (UPAGES * PAGE_SIZE) - 1, UPAGES); printf(mem_fmt_nov, "Message Buffer", msgbufphys, msgbufphys + msgbuf_pgs * PAGE_SIZE - 1, msgbuf_pgs); printf(mem_fmt, "Free Memory", physical_freestart, physical_freeend-1, KERN_PHYSTOV(physical_freestart), KERN_PHYSTOV(physical_freeend-1), free_pages); #endif /* * Now we have the real page tables in place so we can switch to them. * Once this is done we will be running with the REAL kernel page * tables. */ /* Switch tables */ #ifdef VERBOSE_INIT_ARM printf("switching to new L1 page table @%#lx...", l1_pa); #endif cpu_domains((DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)) | DOMAIN_CLIENT); cpu_setttb(l1_pa, true); cpu_tlb_flushID(); cpu_domains(DOMAIN_CLIENT << (PMAP_DOMAIN_KERNEL*2)); #ifdef VERBOSE_INIT_ARM printf("OK.\n"); #endif }