mips64引导问题(1)
程序代码:
.set noreorder .globl _start .globl start _start: start: .globl stack stack = start - 0x4000 mtc0 zero, COP_0_STATUS_REG mtc0 zero, COP_0_CAUSE_REG li t0, SR_BOOT_EXC_VEC mtc0 t0, COP_0_STATUS_REG la sp, stack bal uncached /* Switch to uncached address space */ nop uncached: or ra, UNCACHED_MEMORY_ADDR j ra nop
引导代码bal为什么能够跳转到uncached执行(地址怎么计算的)?目的是什么?