From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Message-ID: <3BCD5B30.5396ADEC@disca.upv.es> Date: Wed, 17 Oct 2001 12:19:28 +0200 From: David de =?iso-8859-1?Q?Andr=E9s=20Mart=EDnez?= MIME-Version: 1.0 To: linuxppc-embedded@lists.linuxppc.org Subject: Access to registers of MPC823E Content-Type: text/plain; charset=iso-8859-1 Sender: owner-linuxppc-embedded@lists.linuxppc.org List-Id: Hello, I'm trying to write a program to run in Linux 2.4.4 (booting from PPCBoot) on a TQM823L (MPC823E), but I'm having some problems. I have the following definitions in the headers: ---------------- #define TCGR IMR_USHORT(0x0980) #define IMR_USHORT(addr) V_USHORT(CFG_IMMR + addr) #define IMR_USHORT(addr) (addr) #define V_USHORT(a) (*(volatile unsigned short *)(a)) #define CFG_IMMR 0xFFF00000 ---------------- When my main program tries to access to TCGR to read or write it simply exits out of the program without a warning into the shell. ---------- > ./main > START.... > ---------- Just to check if something is wrong, I have tested this code: ----------------- unsigned long immr; asm( "mfspr %0,638": "=r"(immr) : ); printf("IMMR = %li\n", immr); ---------------- But it didn't printf anything, just gets out of the program as before. Got any idea of what can be going on? -- ---------------------------------------------------------------------- | David de Andrés Martínez | Fault Tolerant Systems research Group | | | | | Computer Science Engineer | Email: ddandres@disca.upv.es | | Doctorate Student | Phone: +34 96 387.75.74 Ext 75774 | | | Fax: +34 96 387.75.79 | -------Address-------------------------------------------------------- | DISCA-EUI | | Universidad Politécnica de Valencia | | Campus de Vera #14 | | Valencia E-46021 | | Spain | ---------------------------------------------------------------------- ** Sent via the linuxppc-embedded mail list. See http://lists.linuxppc.org/