Hi Rebecca,<br /><br />On Mon, Jan 4, 2021 at 02:58 PM, Rebecca Cran wrote:<br />
<blockquote>+// UINT32<br />+// ReadCCSIDR2 (<br />+// IN UINT32 CSSELR<br />+// )<br />+ASM_FUNC(ReadCCSIDR2)<br />+ mcr p15,2,r0,c0,c0,0 @ Write Cache Size Selection Register (CSSELR)<br />+ isb<br />+ mrc p15,1,r0,c0,c2,0 @ Read current CP15 Cache Size ID Register (CCSIDR2)</blockquote>
I believe the instruction encoding for CCSIDR2 should be mrc p15,1,r0,c0,c0,2 <br />Similar change is needed in <span id="main">ArmLibSupportV7.asm</span><br />
<blockquote>+ bx lr<br />+</blockquote>
Regards,<br /><br />Sami Mujawar