35,30 → 35,56 |
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#include <console/console.h> |
#include <console/chardev.h> |
#include <sysinfo/sysinfo.h> |
#include <synch/waitq.h> |
#include <synch/spinlock.h> |
#include <arch/types.h> |
#include <ddi/device.h> |
#include <ddi/irq.h> |
#include <ddi/ddi.h> |
#include <ipc/irq.h> |
#include <arch.h> |
#include <func.h> |
#include <print.h> |
#include <atomic.h> |
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#define BUFLEN 2048 |
static char debug_buffer[BUFLEN]; |
static size_t offset = 0; |
/** Initialize stdout to something that does not print, but does not fail |
* |
* Save data in some buffer so that it could be retrieved in the debugger |
#define KLOG_SIZE PAGE_SIZE |
#define KLOG_LATENCY 8 |
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/**< Kernel log cyclic buffer */ |
static char klog[KLOG_SIZE] __attribute__ ((aligned (PAGE_SIZE))); |
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/**< Kernel log initialized */ |
static bool klog_inited = false; |
/**< First kernel log characters */ |
static index_t klog_start = 0; |
/**< Number of valid kernel log characters */ |
static size_t klog_len = 0; |
/**< Number of stored (not printed) kernel log characters */ |
static size_t klog_stored = 0; |
/**< Number of stored kernel log characters for uspace */ |
static size_t klog_uspace = 0; |
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/**< Kernel log spinlock */ |
SPINLOCK_INITIALIZE(klog_lock); |
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/** Physical memory area used for klog buffer */ |
static parea_t klog_parea; |
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/* |
* For now, we use 0 as INR. |
* However, it is therefore desirable to have architecture specific |
* definition of KLOG_VIRT_INR in the future. |
*/ |
static void null_putchar(chardev_t *d, const char ch) |
{ |
if (offset >= BUFLEN) |
offset = 0; |
debug_buffer[offset++] = ch; |
} |
#define KLOG_VIRT_INR 0 |
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static irq_t klog_irq; |
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static chardev_operations_t null_stdout_ops = { |
.write = null_putchar |
.suspend = NULL, |
.resume = NULL, |
.write = NULL, |
.read = NULL |
}; |
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chardev_t null_stdout = { |
66,10 → 92,58 |
.op = &null_stdout_ops |
}; |
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/** Standard input character device. */ |
/** Allways refuse IRQ ownership. |
* |
* This is not a real IRQ, so we always decline. |
* |
* @return Always returns IRQ_DECLINE. |
*/ |
static irq_ownership_t klog_claim(void) |
{ |
return IRQ_DECLINE; |
} |
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/** Standard input character device */ |
chardev_t *stdin = NULL; |
chardev_t *stdout = &null_stdout; |
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/** Initialize kernel logging facility |
* |
* The shared area contains kernel cyclic buffer. Userspace application may |
* be notified on new data with indication of position and size |
* of the data within the circular buffer. |
*/ |
void klog_init(void) |
{ |
void *faddr = (void *) KA2PA(klog); |
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ASSERT((uintptr_t) faddr % FRAME_SIZE == 0); |
ASSERT(KLOG_SIZE % FRAME_SIZE == 0); |
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devno_t devno = device_assign_devno(); |
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klog_parea.pbase = (uintptr_t) faddr; |
klog_parea.vbase = (uintptr_t) klog; |
klog_parea.frames = SIZE2FRAMES(KLOG_SIZE); |
klog_parea.cacheable = true; |
ddi_parea_register(&klog_parea); |
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sysinfo_set_item_val("klog.faddr", NULL, (unative_t) faddr); |
sysinfo_set_item_val("klog.pages", NULL, SIZE2FRAMES(KLOG_SIZE)); |
sysinfo_set_item_val("klog.devno", NULL, devno); |
sysinfo_set_item_val("klog.inr", NULL, KLOG_VIRT_INR); |
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irq_initialize(&klog_irq); |
klog_irq.devno = devno; |
klog_irq.inr = KLOG_VIRT_INR; |
klog_irq.claim = klog_claim; |
irq_register(&klog_irq); |
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spinlock_lock(&klog_lock); |
klog_inited = true; |
spinlock_unlock(&klog_lock); |
} |
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/** Get character from character device. Do not echo character. |
* |
* @param chardev Character device. |
90,7 → 164,7 |
return chardev->op->read(chardev); |
/* no other way of interacting with user, halt */ |
if (CPU) |
printf("cpu%d: ", CPU->id); |
printf("cpu%u: ", CPU->id); |
else |
printf("cpu: "); |
printf("halted - no kconsole\n"); |
159,10 → 233,60 |
return ch; |
} |
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void klog_update(void) |
{ |
spinlock_lock(&klog_lock); |
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if ((klog_inited) && (klog_irq.notif_cfg.notify) && (klog_uspace > 0)) { |
ipc_irq_send_msg_3(&klog_irq, klog_start, klog_len, klog_uspace); |
klog_uspace = 0; |
} |
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spinlock_unlock(&klog_lock); |
} |
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void putchar(char c) |
{ |
spinlock_lock(&klog_lock); |
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if ((klog_stored > 0) && (stdout->op->write)) { |
/* Print charaters stored in kernel log */ |
index_t i; |
for (i = klog_len - klog_stored; i < klog_len; i++) |
stdout->op->write(stdout, klog[(klog_start + i) % KLOG_SIZE]); |
klog_stored = 0; |
} |
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/* Store character in the cyclic kernel log */ |
klog[(klog_start + klog_len) % KLOG_SIZE] = c; |
if (klog_len < KLOG_SIZE) |
klog_len++; |
else |
klog_start = (klog_start + 1) % KLOG_SIZE; |
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if (stdout->op->write) |
stdout->op->write(stdout, c); |
else { |
/* The character is just in the kernel log */ |
if (klog_stored < klog_len) |
klog_stored++; |
} |
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/* The character is stored for uspace */ |
if (klog_uspace < klog_len) |
klog_uspace++; |
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/* Check notify uspace to update */ |
bool update; |
if ((klog_uspace > KLOG_LATENCY) || (c == '\n')) |
update = true; |
else |
update = false; |
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spinlock_unlock(&klog_lock); |
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if (update) |
klog_update(); |
} |
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/** @} |