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hw/alpha: Provide console information to the PALcode at start-up 

Redefine the a2 register passed by Qemu at start-up to also include
some configuration flags, in addition to the CPU count, and define
a flag to mirror the "-nographic" option.

Signed-off-by: Jason Thorpe <thorpej@me.com>
Message-Id: <20210613211549.18094-5-thorpej@me.com>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Jason Thorpe 2021-06-13 14:15:49 -07:00 committed by Richard Henderson
parent 3a8233dc1f
commit 387a1dcb35
1 changed files with 11 additions and 1 deletions
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12
hw/alpha/dp264.c
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@ -72,9 +72,19 @@ static void clipper_init(MachineState *machine)
cpus[i] = ALPHA_CPU(cpu_create(machine->cpu_type));
}
/*
* arg0 -> memory size
* arg1 -> kernel entry point
* arg2 -> config word
*
* Config word: bits 0-5 -> ncpus
* bit 6 -> nographics option (for HWRPB CTB)
*
* See init_hwrpb() in the PALcode.
*/
cpus[0]->env.trap_arg0 = ram_size;
cpus[0]->env.trap_arg1 = 0;
cpus[0]->env.trap_arg2 = smp_cpus;
cpus[0]->env.trap_arg2 = smp_cpus | (!machine->enable_graphics << 6);
/*
* Init the chipset. Because we're using CLIPPER IRQ mappings,