From 56dc6ecb70e6fc76d32d6a7194acb273b76bfe0e Mon Sep 17 00:00:00 2001
From: David Guillen Fandos
Date: Mon, 8 Mar 2021 18:44:03 +0100
Subject: Remove libco

This removes libco and all the usages of it (+pthreads).
Rewired all dynarecs and interpreter to return after every frame so that
libretro can process events. This required to make dynarec re-entrant.

Dynarecs were updated to check for new frame on every update (IRQ, cycle
exhaustion, I/O write, etc). The performance impact of doing so should
be minimal (and definitely outweight the libco gains). While at it,
fixed small issues to get a bit more perf: arm dynarec was not idling
correctly, mips was using stack when not needed, etc.

Tested on PSP (mips), OGA (armv7), Linux (x86 and interpreter). Not
tested on Android though.
---
 libco/psp2.c | 116 -----------------------------------------------------------
 1 file changed, 116 deletions(-)
 delete mode 100644 libco/psp2.c

(limited to 'libco/psp2.c')

diff --git a/libco/psp2.c b/libco/psp2.c
deleted file mode 100644
index 3ab1bc7..0000000
--- a/libco/psp2.c
+++ /dev/null
@@ -1,116 +0,0 @@
-/*
-  libco.arm (2016-08-14)
-  author: frangarcj
-  license: public domain
-*/
-
-#define LIBCO_C
-#include "libco.h"
-
-#include <assert.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <psp2/kernel/sysmem.h>
-#include <stdio.h>
-#include <string.h>
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-static inline int align(int x, int n) {
-  return (((x >> n) + 1) << n );
-}
-#define FOUR_KB_ALIGN(x) align(x, 12)
-#define MB_ALIGN(x) align(x, 20)
-
-static thread_local unsigned long co_active_buffer[64];
-static thread_local cothread_t co_active_handle = 0;
-static void (*co_swap)(cothread_t, cothread_t) = 0;
-static int block;
-static uint32_t co_swap_function[] = {
-  0xe8a16ff0,  /* stmia r1!, {r4-r11,sp,lr} */
-  0xe8b0aff0,  /* ldmia r0!, {r4-r11,sp,pc} */
-  0xe12fff1e,  /* bx lr                     */
-};
-
-void co_init() {
-  int ret;
-  void *base;
-
-  block = sceKernelAllocMemBlockForVM("libco", MB_ALIGN(FOUR_KB_ALIGN(sizeof co_swap_function)));
-  if (block < 0)
-  {
-    return;
-  }
-  
-  // get base address
-  ret = sceKernelGetMemBlockBase(block, &base);
-  if (ret < 0)
-  {
-    return;
-  }
-
-  // set domain to be writable by user
-  ret = sceKernelOpenVMDomain();
-  if (ret < 0)
-  {
-    return;
-  }
-
-
-  memcpy(base,co_swap_function,sizeof co_swap_function);
-
-  // set domain back to read-only
-  ret = sceKernelCloseVMDomain();
-  if (ret < 0)
-  {
-    return;
-  }
-
-  // flush icache
-  ret = sceKernelSyncVMDomain(block, base, MB_ALIGN(FOUR_KB_ALIGN(sizeof co_swap_function)));
-  if (ret < 0)
-  {
-    return;
-  }
-  
-  co_swap = (void (*)(cothread_t, cothread_t))base;
-  
-
-}
-
-cothread_t co_active() {
-  if(!co_active_handle) co_active_handle = &co_active_buffer;
-  return co_active_handle;
-}
-
-cothread_t co_create(unsigned int size, void (*entrypoint)(void)) {
-  unsigned long* handle = 0;
-  if(!co_swap) {
-    co_init();
-  }
-  if(!co_active_handle) co_active_handle = &co_active_buffer;
-  size += 256;
-  size &= ~15;
-
-  if((handle = (unsigned long*)malloc(size))) {
-    unsigned long* p = (unsigned long*)((unsigned char*)handle + size);
-    handle[8] = (unsigned long)p;
-    handle[9] = (unsigned long)entrypoint;
-  }
-
-  return handle;
-}
-
-void co_delete(cothread_t handle) {
-  free(handle);
-}
-
-void co_switch(cothread_t handle) {
-  cothread_t co_previous_handle = co_active_handle;
-  co_swap(co_active_handle = handle, co_previous_handle);
-}
-
-#ifdef __cplusplus
-}
-#endif
-- 
cgit v1.2.3