diff options
Diffstat (limited to 'c/src/lib/libbsp/powerpc/shared/startup/bspstart.c')
| -rw-r--r-- | c/src/lib/libbsp/powerpc/shared/startup/bspstart.c | 137 |
1 files changed, 38 insertions, 99 deletions
diff --git a/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c b/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c index 73b02117b7..6c5faae3bb 100644 --- a/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c +++ b/c/src/lib/libbsp/powerpc/shared/startup/bspstart.c @@ -28,7 +28,6 @@ #include <bsp/pci.h> #include <bsp/openpic.h> #include <bsp/irq.h> -#include <bsp/VME.h> #include <libcpu/bat.h> #include <libcpu/pte121.h> #include <libcpu/cpuIdent.h> @@ -101,6 +100,10 @@ char loaderParam[MAX_LOADER_ADD_PARM]; */ unsigned int BSP_mem_size; /* + * Where the heap starts; is used by bsp_pretasking_hook; + */ +unsigned int BSP_heap_start; +/* * PCI Bus Frequency */ unsigned int BSP_bus_frequency; @@ -148,59 +151,9 @@ char *rtems_progname; */ void bsp_postdriver_hook(void); +void bsp_pretasking_hook(void); void bsp_libc_init( void *, uint32_t, int ); -/* - * Function: bsp_pretasking_hook - * Created: 95/03/10 - * - * Description: - * BSP pretasking hook. Called just before drivers are initialized. - * Used to setup libc and install any BSP extensions. - * - * NOTES: - * Must not use libc (to do io) from here, since drivers are - * not yet initialized. - * - */ - -void bsp_pretasking_hook(void) -{ - uint32_t heap_start; - uint32_t heap_size; - uint32_t heap_sbrk_spared; - extern uint32_t _bsp_sbrk_init(uint32_t, uint32_t*); - - heap_start = ((uint32_t) __rtems_end) + - INIT_STACK_SIZE + INTR_STACK_SIZE; - if (heap_start & (CPU_ALIGNMENT-1)) - heap_start = (heap_start + CPU_ALIGNMENT) & ~(CPU_ALIGNMENT-1); - - heap_size = (BSP_mem_size - heap_start) - BSP_Configuration.work_space_size; - heap_sbrk_spared=_bsp_sbrk_init(heap_start, &heap_size); - -#ifdef SHOW_MORE_INIT_SETTINGS - printk( "HEAP start %x size %x (%x bytes spared for sbrk)\n", - heap_start, heap_size, heap_sbrk_spared); -#endif - - bsp_libc_init((void *) 0, heap_size, heap_sbrk_spared); - -#ifdef RTEMS_DEBUG - rtems_debug_enable( RTEMS_DEBUG_ALL_MASK ); -#endif -} - -void zero_bss() -{ - /* prevent these from being accessed in the short data areas */ - extern unsigned long __bss_start[], __SBSS_START__[], __SBSS_END__[]; - extern unsigned long __SBSS2_START__[], __SBSS2_END__[]; - memset(__SBSS_START__, 0, ((unsigned) __SBSS_END__) - ((unsigned)__SBSS_START__)); - memset(__SBSS2_START__, 0, ((unsigned) __SBSS2_END__) - ((unsigned)__SBSS2_START__)); - memset(__bss_start, 0, ((unsigned) __rtems_end) - ((unsigned)__bss_start)); -} - void save_boot_params(RESIDUAL* r3, void *r4, void* r5, char *additional_boot_options) { @@ -249,14 +202,36 @@ void bsp_start( void ) * function store the result in global variables so that it can be used * later... */ - myCpu = get_ppc_cpu_type(); + myCpu = get_ppc_cpu_type(); myCpuRevision = get_ppc_cpu_revision(); + /* + * Init MMU block address translation to enable hardware access + */ + +#if !defined(mvme2100) + /* + * PC legacy IO space used for inb/outb and all PC compatible hardware + */ + setdbat(1, _IO_BASE, _IO_BASE, 0x10000000, IO_PAGE); +#endif + + /* + * PCI devices memory area. Needed to access OpenPIC features + * provided by the Raven + * + * T. Straumann: give more PCI address space + */ + setdbat(2, PCI_MEM_BASE+PCI_MEM_WIN0, PCI_MEM_BASE+PCI_MEM_WIN0, 0x10000000, IO_PAGE); + + /* + * Must have acces to open pic PCI ACK registers provided by the RAVEN + */ + setdbat(3, 0xf0000000, 0xf0000000, 0x10000000, IO_PAGE); + #if defined(mvme2100) + /* Need 0xfec00000 mapped for this */ EUMBBAR = get_eumbbar(); - - Cpu_table.exceptions_in_RAM = TRUE; - { unsigned v = 0x3000 ; _CPU_MSR_SET(v); } #endif #if !defined(mpc8240) && !defined(mpc8245) @@ -296,8 +271,10 @@ void bsp_start( void ) * This could be done later (e.g in IRQ_INIT) but it helps to understand * some settings below... */ - intrStack = ((uint32_t) __rtems_end) + - INIT_STACK_SIZE + INTR_STACK_SIZE - PPC_MINIMUM_STACK_FRAME_SIZE; + BSP_heap_start = ((uint32_t) __rtems_end) + INIT_STACK_SIZE + INTR_STACK_SIZE; + + /* reserve space for the marker/tag frame */ + intrStack = BSP_heap_start - PPC_MINIMUM_STACK_FRAME_SIZE; /* make sure it's properly aligned */ intrStack &= ~(CPU_STACK_ALIGNMENT-1); @@ -311,35 +288,13 @@ void bsp_start( void ) /* signal them that we have fixed PR288 - eventually, this should go away */ _write_SPRG0(PPC_BSP_HAS_FIXED_PR288); + /* initialize_exceptions() evaluates the exceptions_in_RAM flag */ + Cpu_table.exceptions_in_RAM = TRUE; /* * Initialize default raw exception handlers. See vectors/vectors_init.c */ initialize_exceptions(); - /* - * Init MMU block address translation to enable hardware access - */ - -#if !defined(mvme2100) - /* - * PC legacy IO space used for inb/outb and all PC compatible hardware - */ - setdbat(1, _IO_BASE, _IO_BASE, 0x10000000, IO_PAGE); -#endif - - /* - * PCI devices memory area. Needed to access OpenPIC features - * provided by the Raven - * - * T. Straumann: give more PCI address space - */ - setdbat(2, PCI_MEM_BASE+PCI_MEM_WIN0, PCI_MEM_BASE+PCI_MEM_WIN0, 0x10000000, IO_PAGE); - - /* - * Must have acces to open pic PCI ACK registers provided by the RAVEN - */ - setdbat(3, 0xf0000000, 0xf0000000, 0x10000000, IO_PAGE); - select_console(CONSOLE_LOG); /* @@ -460,8 +415,7 @@ void bsp_start( void ) Cpu_table.postdriver_hook = bsp_postdriver_hook; Cpu_table.do_zero_of_workspace = TRUE; Cpu_table.interrupt_stack_size = CONFIGURE_INTERRUPT_STACK_MEMORY; - Cpu_table.clicks_per_usec = BSP_processor_frequency/(BSP_time_base_divisor * 1000); - Cpu_table.exceptions_in_RAM = TRUE; + Cpu_table.clicks_per_usec = BSP_bus_frequency/(BSP_time_base_divisor * 1000); #ifdef SHOW_MORE_INIT_SETTINGS printk("BSP_Configuration.work_space_size = %x\n", @@ -493,25 +447,10 @@ void bsp_start( void ) printk("Page table setup finished; will activate it NOW...\n"); #endif BSP_pgtbl_activate(pt); -#if !defined(mvme2100) /* finally, switch off DBAT3 */ setdbat(3, 0, 0, 0, 0); -#endif } - /* - * Initialize VME bridge - needs working PCI and IRQ subsystems... - */ -#ifdef SHOW_MORE_INIT_SETTINGS - printk("Going to initialize VME bridge\n"); -#endif - - /* - * VME initialization is in a separate file so apps which don't use VME or - * want a different configuration may link against a customized routine. - */ - BSP_vme_config(); - #if defined(DEBUG_BATS) ShowBATS(); #endif |