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Draft: lab 5 failed

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This commit is contained in:
Yi-Ting Shih
2025-05-03 20:45:34 +08:00
parent 981cae803b
commit e73f90395d
39 changed files with 588 additions and 429 deletions
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15
kernel/lib/mbox.c
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@@ -27,7 +27,7 @@
#include <mbox.h>
/* mailbox message buffer */
volatile unsigned int __attribute__((aligned(16))) mbox[36];
// volatile unsigned int __attribute__((aligned(16))) mbox[36];
#define VIDEOCORE_MBOX (MMIO_BASE+0x0000B880)
#define MBOX_READ ((volatile unsigned int*)(VIDEOCORE_MBOX+0x0))
@@ -49,7 +49,7 @@ volatile unsigned int __attribute__((aligned(16))) mbox[36];
/**
* Make a mailbox call. Returns 0 on failure, non-zero on success
*/
int mbox_call(unsigned char ch)
int mbox_call(unsigned char ch, unsigned int *mbox)
{
unsigned int r = (((unsigned int)((unsigned long)&mbox)&~0xF) | (ch&0xF));
/* wait until we can write to the mailbox */
@@ -57,7 +57,7 @@ int mbox_call(unsigned char ch)
/* write the address of our message to the mailbox with channel identifier */
*MBOX_WRITE = r;
/* now wait for the response */
while(1) {
for (;;) {
/* is there a response? */
do{asm volatile("nop");}while(*MBOX_STATUS & MBOX_EMPTY);
/* is it a response to our message? */
@@ -70,6 +70,7 @@ int mbox_call(unsigned char ch)
unsigned int get_board_revision(void)
{
unsigned int __attribute__((aligned(16))) mbox[36];
mbox[0] = 36 * 4;
mbox[1] = MBOX_REQUEST;
@@ -81,13 +82,14 @@ unsigned int get_board_revision(void)
mbox[6] = MBOX_TAG_LAST;
mbox_call(MBOX_CH_PROP);
mbox_call(MBOX_CH_PROP, mbox);
return mbox[5];
}
unsigned int get_memory_base_addr(void)
{
unsigned int __attribute__((aligned(16))) mbox[36];
mbox[0] = 36 * 4;
mbox[1] = MBOX_REQUEST;
@@ -100,13 +102,14 @@ unsigned int get_memory_base_addr(void)
mbox[7] = MBOX_TAG_LAST;
mbox_call(MBOX_CH_PROP);
mbox_call(MBOX_CH_PROP, mbox);
return mbox[5];
}
unsigned int get_memory_size(void)
{
unsigned int __attribute__((aligned(16))) mbox[36];
mbox[0] = 36 * 4;
mbox[1] = MBOX_REQUEST;
@@ -119,7 +122,7 @@ unsigned int get_memory_size(void)
mbox[7] = MBOX_TAG_LAST;
mbox_call(MBOX_CH_PROP);
mbox_call(MBOX_CH_PROP, mbox);
return mbox[6];
}