X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;f=qemu%2Froms%2FSLOF%2Fclients%2Fnet-snk%2Fkernel%2Fentry.S;fp=qemu%2Froms%2FSLOF%2Fclients%2Fnet-snk%2Fkernel%2Fentry.S;h=8849fb9d1a5697d1851f8d78cc270dcc34e95ca1;hb=e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb;hp=0000000000000000000000000000000000000000;hpb=9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00;p=kvmfornfv.git diff --git a/qemu/roms/SLOF/clients/net-snk/kernel/entry.S b/qemu/roms/SLOF/clients/net-snk/kernel/entry.S new file mode 100644 index 000000000..8849fb9d1 --- /dev/null +++ b/qemu/roms/SLOF/clients/net-snk/kernel/entry.S @@ -0,0 +1,127 @@ +/****************************************************************************** + * Copyright (c) 2004, 2008 IBM Corporation + * All rights reserved. + * This program and the accompanying materials + * are made available under the terms of the BSD License + * which accompanies this distribution, and is available at + * http://www.opensource.org/licenses/bsd-license.php + * + * Contributors: + * IBM Corporation - initial implementation + *****************************************************************************/ + +#define STACKSIZE 0x100000 +#include + + + .section ".toc","aw" # TOC entries are needed for relocation +.exception_stack_frame_toc: + .tc exception_stack_frame[TC],exception_stack_frame +.exit_sp_toc: + .tc _exit_sp[TC],_exit_sp +.prom_entry_toc: + .tc _prom_entry[TC],_prom_entry + + .previous + + +/* +Function: + Input: + r3: + r4: + r5: prom entry + Output: + +Decription: Main entry point, called from OF + +*/ +C_ENTRY(_entry) + mr r3, r6 # parm 0 passed in r6 + mr r4, r7 # parm 1 passed in r7 + mr r6, r1 # save stack pointer + mflr r7 # save link register + bcl 20,31,over # branch after pointer table +base: + .align 3 +.LCgot: .quad _got-base+0x8000 +.LCstack: .quad _stack+STACKSIZE-0x80-base +over: + mflr r8 # gpr 8 is the base + ld r1,.LCstack-base(r8) # load new stack pointer + add r1, r1, r8 # add base + std r2, 64(r1) # save got + std r7, 56(r1) # save link register + ld r2, .LCgot-base(r8) # load got pointer + add r2, r2, r8 # add base + std r6, 0(r1) # save stack pointer + + ld r6, .prom_entry_toc@toc(r2) + std r5, 0(r6) # Save prom handle + + ld r10, .exit_sp_toc@toc(r2) # save stack pointer for exit call + std r1, 0(r10) + + bl ._start_kernel # call kernel init code + +the_end: + ld r4, 56(r1) # Restore link register + mtlr r4 + ld r2, 64(r1) # restore got + ld r1, 0(r1) + + blr + +/* + * Function: _callback_entry + * Input: r6 start address of parameter string + * r7 length of parameter string. + * + * Description: If a client application wants to register a callback function, + * this function is registered w/ SLOF, not the application's function. SLOF + * passes the parameter string in Forth representation in R6 and R7. This + * function moves R6 to R3 and R7 to R4 and then calls callback_entry(). + * + */ +C_ENTRY(_callback_entry) + # Save the LR + mflr r0 + std r0, 16(r1) + + # Reserve stack space + stdu r1, -32(r1) + + # SLOF passes the parameters in Registers R6 and R7 but the target + # wants them in registers R3 and R4 + mr r3, r6 + mr r4, r7 + + # Branch to the callback_entry function + bl .callback_entry + + # Destroy stack frame + ld r1, 0(r1) + + # Restore LR + ld r0, 16(r1) + mtlr r0 + + # Return to caller + blr + + .section ".bss" + +_exit_sp: .quad 0 + +.global _prom_entry +_prom_entry: .quad 0 + + .section ".text" + +C_ENTRY(_exit) + ld r1, .exit_sp_toc@toc(r2) + ld r1, 0(r1) + b the_end + + + .lcomm _stack,STACKSIZE,16