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soc/intel_adsp: Use the correct MP stack pointer

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The kernel passes the CPU's interrupt stack expected that it will
start on that, so do it.  Pass the initial stack pointer from the SOC
layer in the variable "z_mp_stack_top" and set it in the assembly
startup before calling z_mp_entry().

Signed-off-by: Andy Ross <andrew.j.ross@intel.com>
This commit is contained in:
Andy Ross 2021-02-15 22:19:51 -08:00 • committed by Anas Nashif
commit 613594e68c
2 changed files with 10 additions and 3 deletions
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6
soc/xtensa/intel_adsp/common/soc_mp.c
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@ -61,13 +61,14 @@ struct cpustart_rec {
uint32_t cpu;
arch_cpustart_t fn;
char *stack_top;
void *arg;
uint32_t vecbase;
uint32_t alive;
};
char *z_mp_stack_top;
#ifdef CONFIG_KERNEL_COHERENCE
/* Coherence guarantees that normal .data will be coherent and that it
* won't overlap any cached memory.
@ -158,11 +159,12 @@ void arch_start_cpu(int cpu_num, k_thread_stack_t *stack, int sz,
start_rec.cpu = cpu_num;
start_rec.fn = fn;
start_rec.stack_top = Z_THREAD_STACK_BUFFER(stack) + sz;
start_rec.arg = arg;
start_rec.vecbase = vecbase;
start_rec.alive = 0;
z_mp_stack_top = Z_THREAD_STACK_BUFFER(stack) + sz;
#ifdef CONFIG_IPM_CAVS_IDC
idc = device_get_binding(DT_LABEL(DT_INST(0, intel_cavs_idc)));
#endif