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recover bootmmu.c

This commit is contained in:
lr 2024-07-08 18:07:42 +08:00
parent ef0df95a36
commit d1072fd3c2
1 changed files with 0 additions and 88 deletions
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88
Ubiquitous/XiZi_AIoT/hardkernel/mmu/arm/armv8-a/cortex-a55/bootmmu.c
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@ -122,89 +122,6 @@ static void build_boot_pgdir()
}
#include "log.h"
#include "ns16550.h"
#define UART_LCRVAL UART_LCR_8N1 /* 8 data, 1 stop, no parity */
#define UART_MCRVAL (UART_MCR_DTR | UART_MCR_RTS) /* RTS/DTR */
#define out_le32(a, v) (*(volatile uint32_t*)(a) = (v))
#define in_le32(a) (*(volatile uint32_t*)(a))
#ifndef CONFIG_SYS_NS16550_IER
#define CONFIG_SYS_NS16550_IER 0x00
#endif /* CONFIG_SYS_NS16550_IER */
#define serial_dout(reg, value) \
serial_out_shift((char*)com_port + ((char*)reg - (char*)com_port) * (1 << 2), \
2, value)
#define serial_din(reg) \
serial_in_shift((char*)com_port + ((char*)reg - (char*)com_port) * (1 << 2), \
2)
#define DIV_ROUND_CLOSEST(x, divisor) ( \
{ \
typeof(x) __x = x; \
typeof(divisor) __d = divisor; \
(((typeof(x))-1) > 0 || ((typeof(divisor))-1) > 0 || (__x) > 0) ? (((__x) + ((__d) / 2)) / (__d)) : (((__x) - ((__d) / 2)) / (__d)); \
})
int _ns16550_calc_divisor(NS16550_t port, int clock, int baudrate)
{
const unsigned int mode_x_div = 16;
return DIV_ROUND_CLOSEST(clock, mode_x_div * baudrate);
}
static inline void serial_out_shift(void* addr, int shift, int value)
{
out_le32(addr, value);
}
static inline int serial_in_shift(void* addr, int shift)
{
return in_le32(addr);
}
void __debug_uart_init(void)
{
struct NS16550* com_port = (struct NS16550*)0xFE660000ULL;
/*
* We copy the code from above because it is already horribly messy.
* Trying to refactor to nicely remove the duplication doesn't seem
* feasible. The better fix is to move all users of this driver to
* driver model.
*/
int baud_divisor = _ns16550_calc_divisor(com_port, 24000000,
1500000);
serial_dout(&com_port->ier, CONFIG_SYS_NS16550_IER);
serial_dout(&com_port->mcr, UART_MCRVAL);
serial_dout(&com_port->fcr, UART_FCR_DEFVAL);
serial_dout(&com_port->lcr, UART_LCR_BKSE | UART_LCRVAL);
serial_dout(&com_port->dll, baud_divisor & 0xff);
serial_dout(&com_port->dlm, (baud_divisor >> 8) & 0xff);
serial_dout(&com_port->lcr, UART_LCRVAL);
}
void __debug_uart_putc(int ch)
{
static struct NS16550* com_port = (struct NS16550*)0xFE660000ULL;
if (ch == '\n') {
_debug_uart_putc('\r');
}
while (!(serial_din(&com_port->lsr) & UART_LSR_THRE))
;
serial_dout(&com_port->thr, ch);
}
void __print(){
__debug_uart_init();
for(int i = 0; i < 10; i++){
__debug_uart_putc((int)'+');
}
}
static void load_boot_pgdir()
{
@ -253,11 +170,6 @@ extern void main(void);
static bool _bss_inited = false;
void bootmain()
{
__print();
// if(_bss_inited){
// unsigned int* p = (unsigned int*)0xffffffff;
// *p = 0;
// }
build_boot_pgdir();
load_boot_pgdir();
__asm__ __volatile__("add sp, sp, %0" ::"r"(KERN_OFFSET));