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hw: kernel initialization in extra function

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ref #1006
This commit is contained in:
Martin Stein 2013-12-18 16:18:16 +01:00 committed by Norman Feske
parent c288973bf2
commit 722154f0a8
3 changed files with 69 additions and 75 deletions
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12
base-hw/src/core/arm/crt0.s
View File

@ -34,8 +34,6 @@
_nop 8
/* zero-fill BSS segment, BSS boundaries must be aligned to 4 */
.extern _bss_start
.extern _bss_end
ldr r0, =_bss_start
ldr r1, =_bss_end
mov r2, #0
@ -47,17 +45,15 @@
b 1b
2:
/* enable C++ to prepare the first kernel run */
/* prepare the first call of the kernel main-routine */
ldr sp, =_kernel_stack_high
bl init_phys_kernel
bl setup_kernel
/* call kernel routine */
.extern kernel
_start_kernel:
/* call the kernel main-routine */
ldr sp, =_kernel_stack_high
bl kernel
/* catch erroneous kernel return */
/* catch erroneous return */
3: b 3b
.section .bss

126
base-hw/src/core/kernel/kernel.cc
View File

@ -192,80 +192,74 @@ namespace Kernel
}
}
/**
* Prepare the system for the first run of 'kernel'
*/
extern "C" void init_phys_kernel() {
Cpu::init_phys_kernel(); }
/**
* Kernel main routine
* Prepare the first call of the kernel main-routine
*/
extern "C" void setup_kernel()
{
/* initialize processor in physical mode */
Cpu::init_phys_kernel();
/* enable kernel timer */
pic()->unmask(Timer::IRQ);
/* TrustZone initialization code */
trustzone_initialization(pic());
/* enable performance counter */
perf_counter()->enable();
/* switch to core address space */
Cpu::init_virt_kernel(core()->tlb()->base(), core_id());
/*
* From this point on, it is safe to use 'cmpxchg', i.e., to create
* singleton objects via the static-local object pattern. See
* the comment in 'src/base/singleton.h'.
*/
/* create the core main thread */
{
/* get stack memory that fullfills the constraints for core stacks */
enum {
STACK_ALIGNM = 1 << Genode::CORE_STACK_ALIGNM_LOG2,
STACK_SIZE = DEFAULT_STACK_SIZE,
};
if (STACK_SIZE > STACK_ALIGNM - sizeof(Core_thread_id)) {
PERR("stack size does not fit stack alignment of core");
}
static char s[STACK_SIZE] __attribute__((aligned(STACK_ALIGNM)));
/* provide thread ident at the aligned base of the stack */
*(Core_thread_id *)s = 0;
/* start thread with stack pointer at the top of stack */
static Native_utcb utcb;
static Thread t(Priority::MAX, "core");
_main_thread_id = t.id();
_main_thread_utcb = &utcb;
_main_thread_utcb->start_info()->init(t.id(), Genode::Native_capability());
t.ip = (addr_t)CORE_MAIN;;
t.sp = (addr_t)s + STACK_SIZE;
t.init(0, core_id(), &utcb, 1);
}
/* kernel initialization finished */
init_platform();
reset_lap_time();
}
/**
* Main routine of every kernel pass
*/
extern "C" void kernel()
{
static bool initial_call = true;
/* an exception occurred */
if (!initial_call)
{
/* handle exception that interrupted the last user */
cpu_scheduler()->head()->handle_exception();
/* kernel initialization */
} else {
/* enable kernel timer */
pic()->unmask(Timer::IRQ);
/* TrustZone initialization code */
trustzone_initialization(pic());
/* enable performance counter */
perf_counter()->enable();
/* switch to core address space */
Cpu::init_virt_kernel(core()->tlb()->base(), core_id());
/*
* From this point on, it is safe to use 'cmpxchg', i.e., to create
* singleton objects via the static-local object pattern. See
* the comment in 'src/base/singleton.h'.
*/
/* create the core main thread */
{
/* get stack memory that fullfills the constraints for core stacks */
enum {
STACK_ALIGNM = 1 << Genode::CORE_STACK_ALIGNM_LOG2,
STACK_SIZE = DEFAULT_STACK_SIZE,
};
if (STACK_SIZE > STACK_ALIGNM - sizeof(Core_thread_id)) {
PERR("stack size does not fit stack alignment of core");
}
static char s[STACK_SIZE] __attribute__((aligned(STACK_ALIGNM)));
/* provide thread ident at the aligned base of the stack */
*(Core_thread_id *)s = 0;
/* start thread with stack pointer at the top of stack */
static Native_utcb utcb;
static Thread t(Priority::MAX, "core");
_main_thread_id = t.id();
_main_thread_utcb = &utcb;
_main_thread_utcb->start_info()->init(t.id(), Genode::Native_capability());
t.ip = (addr_t)CORE_MAIN;;
t.sp = (addr_t)s + STACK_SIZE;
t.init(0, core_id(), &utcb, 1);
}
/* kernel initialization finished */
init_platform();
reset_lap_time();
initial_call = false;
}
/* will jump to the context related mode-switch */
cpu_scheduler()->head()->handle_exception();
cpu_scheduler()->head()->proceed();
}
Kernel::Mode_transition_control * Kernel::mtc()
{
/* compose CPU context for kernel entry */

6
base-hw/src/core/kernel/thread.cc
View File

@ -180,7 +180,9 @@ Thread::Thread(unsigned const priority, char const * const label)
_utcb_phys(0),
_signal_receiver(0),
_label(label)
{ }
{
cpu_exception = RESET;
}
void
@ -236,6 +238,8 @@ void Thread::handle_exception()
case FAST_INTERRUPT_REQUEST:
handle_interrupt();
return;
case RESET:
return;
default:
PERR("unknown exception");
_stop();