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prepare memory reorganization and minor fixes

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This commit is contained in:
Bas Wijnen
2009-07-16 09:15:15 +02:00
parent 4b47df85e3
commit cc1dc267d5
9 changed files with 92 additions and 74 deletions
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2
mips/arch.hhp
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@@ -154,7 +154,7 @@ extern "C":
#ifdef INIT
// Initialize most things (the rest is done in boot.S)
void init ()
void init (unsigned mem)
// Start running the idle task for the first time.
void run_idle (Thread *self)
#endif

2
mips/boot.S
View File

@@ -55,6 +55,8 @@ start_hack_for_disassembler:
bne $a1, $a0, 1b
addu $a0, 4
// First argument is the memory size: 128 megabytes.
li $a0, 128 << 20
la $t9, init
jr $t9
nop

33
mips/init.ccp
View File

@@ -111,6 +111,7 @@ static void init_threads ():
Thread *previous = NULL
first_scheduled = NULL
first_sleeper = NULL
Receiver *init_receiver = NULL
for unsigned i = 0; i < NUM_THREADS; ++i:
Memory *mem = top_memory.alloc_memory ()
Thread *thread = mem->alloc_thread ()
@@ -185,33 +186,27 @@ static void init_threads ():
thread->arch.a1 = mkcap (mem, CAPTYPE_THREAD | CAP_THREAD_ALL_PRIV_RIGHTS, thread)
thread->arch.a2 = mkcap (mem, CAPTYPE_MEMORY | CAP_MEMORY_ALL_RIGHTS, mem)
thread->arch.a3 = mkcap (mem, CAPTYPE_RECEIVER | (1 << CAP_RECEIVER_CALL), recv)
mem->pfree ((unsigned)pages)
thread->flags = THREAD_FLAG_RUNNING | THREAD_FLAG_PRIV
thread->schedule_next = NULL
thread->schedule_prev = previous
if previous:
previous->schedule_next = thread
else:
if !i:
first_scheduled = thread
init_receiver = recv
else:
thread->arch.t0 = mkcap (mem, (unsigned)init_receiver, (void *)i)
previous->schedule_next = thread
thread->schedule_prev = previous
previous = thread
mem->pfree ((unsigned)pages)
thread->schedule_next = NULL
// Initialize the kernel, finish by falling into the idle task.
extern unsigned _end
void init ():
void init (unsigned mem):
// Disable interrupts and set interrupt vectors to normal.
cp0_set0 (CP0_STATUS)
// Initialize kernel variables to empty.
sleepers = NULL
runners = NULL
zero_pages = NULL
// Fill junk pages with all memory not currently used.
junk_pages = (FreePage *)(((unsigned)&_end + ~PAGE_MASK) & PAGE_MASK)
FreePage *p, *next
unsigned count = 1
for p = junk_pages, next = p; (unsigned)next - 0x80000000 < (1 << 27); p = next, next = (FreePage *)((unsigned)p + PAGE_SIZE):
p->next = next
++count
p->next = NULL
unsigned count = init_memory (mem)
// initialize system control coprocessor.
init_cp0 ()
// initialize everything about the idle task.
@@ -258,13 +253,13 @@ void init ():
GPIO_GPDR (GPIO_USB_CLK_EN_PORT) |= 1 << GPIO_USB_CLK_EN
// Start the operating system timer, and set it to give an interrupt immediately.
// This is better, because the kernel start with jumping into the idle task and
// This is better, because the kernel starts with jumping into the idle task and
// waiting for the first interrupt.
unsigned latch = (JZ_EXTAL + (HZ >> 1)) / HZ
ost_disable_all ()
ost_set_mode (0, OST_TCSR_UIE | OST_TCSR_CKS_EXTAL)
ost_set_reload (0, latch)
ost_set_count (0, 0)
ost_set_count (0, 1)
ost_set_mode (0, OST_TCSR_UIE | OST_TCSR_CKS_EXTAL)
ost_enable_channel (0)
intc_unmask_irq (IRQ_OST0)