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/* Why the linker moves the variable 64K away in assembler
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/* Why the linker moves the variable 64K away in assembler
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 * when not in .text section ????????
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 * when not in .text section ????????
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 */
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 */
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__address supervisor_sp __attribute__ ((section (".text")));
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__address supervisor_sp __attribute__ ((section (".text")));
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void userspace(void)
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void userspace(__address entry)
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{
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{
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    /* EXL=1, UM=1, IE=1 */
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    /* EXL=1, UM=1, IE=1 */
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    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
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    cp0_status_write(cp0_status_read() | (cp0_status_exl_exception_bit |
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                          cp0_status_um_bit |
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                          cp0_status_um_bit |
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                          cp0_status_ie_enabled_bit));
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                          cp0_status_ie_enabled_bit));
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    cp0_epc_write(UTEXT_ADDRESS);
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    cp0_epc_write(entry);
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    userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
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    userspace_asm(USTACK_ADDRESS+PAGE_SIZE);
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    while (1)
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    while (1)
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        ;
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        ;
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}
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}
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